Exhibit 99.1

Navient Student Loan Trust 2015-3

Monthly Servicing Report

Distribution Date 05/26/2026

Collection Period 04/01/2026 - 04/30/2026

Navient Funding, LLC - Depositor

Navient Solutions -  Master Servicer and Administrator

Wells Fargo - Indenture Trustee

Wells Fargo Bank, National Association - Eligible Lender Trustee

Navient Funding - Excess Distribution Certificateholder

Page 1 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

I.
Deal Parameters

A
Student Loan Portfolio Characteristics
    06/18/2015       03/31/2026
      04/30/2026  

Principal Balance
 
$
731,924,193.58
   
$
197,033,278.86
   
$
195,698,307.76
 
 
Interest to be Capitalized Balance
   
5,723,713.00
     
2,012,297.57
     
2,130,591.66
 
 
Pool Balance
 
$
737,647,906.58
   
$
199,045,576.43
   
$
197,828,899.42
 
 
Specified Reserve Account Balance
   
12,418,487.00
     
- N/A -
     
- N/A -
 
 
Adjusted Pool(1)
 
$
750,066,393.58
   
$
199,045,576.43
   
$
197,828,899.42
 
 
Weighted Average Coupon (WAC)
   
5.90%

   
6.55%

   
6.55%

 
Number of Loans
   
106,911
     
18,569
     
18,365
 
 
Aggregate Outstanding Principal Balance - Tbill
         
$
24,831,267.63
   
$
24,519,749.20
 
 
Aggregate Outstanding Principal Balance - SOFR
         
$
174,214,308.80
   
$
173,309,150.22
 
 
Pool Factor
           
0.264464752
     
0.262848197
 
 
Since Issued Constant Prepayment Rate
           
(0.87)%

   
(0.90)%


(1)
The Specified Reserve Account balance is included in the Adjusted Pool until the Pool Balance is less than or equal to 40% of the original pool.
 
B
Debt Securities
Cusip/Isin
  04/27/2026     05/26/2026  
 
A2
63939LAB3
 
$
176,045,576.43
   
$
174,828,899.42
 
 
B
63939LAC1
 
$
20,000,000.00
   
$
20,000,000.00
 

C
Account Balances
 
04/27/2026
   
05/26/2026
 
 
Reserve Account Balance
 
$
752,636.00
   
$
752,636.00
 
 
Capitalized Interest Account Balance
   
-
     
-
 
 
Floor Income Rebate Account
 
$
166,656.17
   
$
250,811.14
 
 
Supplemental Loan Purchase Account
   
-
     
-
 

D
Asset / Liability
 
04/27/2026
   
05/26/2026
 
 
Adjusted Pool Balance + Supplemental Loan Purchase
 
$
199,045,576.43
   
$
197,828,899.42
 
 
Total Notes
 
$
196,045,576.43
   
$
194,828,899.42
 
 
Difference
 
$
3,000,000.00
   
$
3,000,000.00
 
 
Parity Ratio
   
1.01530
     
1.01540
 

Page 2 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

II.
Trust Activity 04/01/2026 through 04/30/2026

A
Student Loan Principal Receipts
     
 
Borrower Principal
   
481,452.66
 
 
Guarantor Principal
   
668,940.26
 
 
Consolidation Activity Principal
   
895,503.30
 
 
Seller Principal Reimbursement
   
-
 
 
Servicer Principal Reimbursement
   
(163.00)
 
 
Rejected Claim Repurchased Principal
   
-
 
 
Other Principal Deposits
   
-
 
 
Total Principal Receipts
 
$
2,045,733.22
 
B
Student Loan Interest Receipts
       
 
Borrower Interest
   
254,940.46
 
 
Guarantor Interest
   
24,064.63
 
 
Consolidation Activity Interest
   
13,901.07
 
 
Special Allowance Payments
   
0.00
 
 
Interest Subsidy Payments
   
0.00
 
 
Seller Interest Reimbursement
   
0.00
 
 
Servicer Interest Reimbursement
   
3,194.97

 
Rejected Claim Repurchased Interest
    0.00  
 
Other Interest Deposits
   
15,447.31
 
 
Total Interest Receipts
 
$
311,548.44
 
C
Reserves in Excess of Requirement
 

-
 
D
Investment Income
 
$
18,183.22
 
E
Funds Borrowed from Next Collection Period
   
-
 
F
Funds Repaid from Prior Collection Period
   
-
 
G
Loan Sale or Purchase Proceeds
   
-
 
H
Initial Deposits to Collection Account
   
-
 
I
Excess Transferred from Other Accounts
   
-
 
J
Other Deposits
   
-
 
K
Funds Released from Capitalized Interest Account
   
-
 
L
Less:  Funds Previously Remitted:
       
 
Servicing Fees to Servicer
   
-
 
 
Consolidation Loan Rebate Fees to Dept. of Education
 
$
(91,281.13)

 
Floor Income Rebate Fees to Dept. of Education
   
-
 
 
Funds Allocated to the Floor Income Rebate Account
 
$
(84,154.97)

M
AVAILABLE FUNDS
 
$
2,200,028.78
 
N
Non-Cash Principal Activity During Collection Period
  $
(710,762.12)
 
O
Non-Reimbursable Losses During Collection Period
 
$
10,052.85
 
P
Aggregate Purchased Amounts by the Depositor, Servicer or Seller
 

-
 
Q
Aggregate Loan Substitutions
   
-
 

Page 3 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

III.
2015-3 Portfolio Characteristics

     
04/30/2026
   
03/31/2026
 
      
Wtd Avg
Coupon
   
# Loans
   
Principal
   
% of
Principal
   
Wtd Avg
Coupon
   
# Loans
   
Principal
   
% of
Principal
 
INTERIM:
IN SCHOOL
   
6.76%

   
9
   
$
54,023.00
     
0.028%

   
6.73%

   
7
   
$
33,523.00
     
0.017%


GRACE
   
0.00%

   
0
   

-
     
0.000%

   
6.80%

   
2
   
$
20,500.00
     
0.010%


DEFERMENT
   
6.52%

   
1,072
   
$
9,232,741.72
     
4.718%

   
6.50%

   
1,092
   
$
9,367,915.26
     
4.754%

                                                                   
REPAYMENT:
CURRENT
   
6.52%

   
12,362
   
$
123,889,988.81
     
63.307%

   
6.50%

   
12,581
   
$
123,222,770.57
     
62.539%


31-60 DAYS DELINQUENT
   
6.52%

   
555
   
$
8,705,988.82
     
4.449%

   
7.01%

   
585
   
$
8,067,821.24
     
4.095%


61-90 DAYS DELINQUENT
   
7.05%

   
366
   
$
5,367,217.73
     
2.743%

   
6.40%

   
419
   
$
5,414,900.33
     
2.748%


91-120 DAYS DELINQUENT
   
6.42%

   
252
   
$
2,840,450.78
     
1.451%

   
6.39%

   
243
   
$
3,585,057.75
     
1.820%


> 120 DAYS DELINQUENT
   
6.49%

   
840
   
$
10,875,970.26
     
5.558%

   
6.47%

   
996
   
$
12,969,471.96
     
6.582%

                                                                   

FORBEARANCE
   
6.60%

   
2,648
   
$
32,221,437.54
     
16.465%

   
6.68%

   
2,455
   
$
32,598,854.66
     
16.545%


CLAIMS IN PROCESS
   
6.53%

   
261
   
$
2,510,489.10
     
1.283%

   
6.96%

   
189
   
$
1,752,464.09
     
0.889%

                                                                   
TOTAL
             
18,365
   
$
195,698,307.76
     
100.00%

           
18,569
   
$
197,033,278.86
     
100.00%


* Percentages may not total 100% due to rounding

Page 4 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

IV.
2015-3 Portfolio Characteristics (cont'd)

   
04/30/2026
   
03/31/2026
 
Pool Balance
 
$
197,828,899.42
   
$
199,045,576.43
 
Outstanding Borrower Accrued Interest
 
$
9,571,899.44
   
$
9,575,400.47
 
Borrower Accrued Interest to be Capitalized
 
$
2,130,591.66
   
$
2,012,297.57
 
Borrower Accrued Interest >30 Days Delinquent
 
$
1,032,804.21
   
$
1,102,117.54
 
Total # Loans
   
18,365
     
18,569
 
Total # Borrowers
   
7,946
     
8,029
 
Weighted Average Coupon
   
6.55%

   
6.55%

Weighted Average Remaining Term
   
209.07
     
208.24
 
Non-Reimbursable Losses
 
$
10,052.85
   
$
93,034.27
 
Cumulative Non-Reimbursable Losses
 
$
4,291,373.13
   
$
4,281,320.28
 
Since Issued Constant Prepayment Rate (CPR)
   
-0.90%

   
-0.87%

Loan Substitutions
   
-
     
-
 
Cumulative Loan Substitutions
   
-
     
-
 
Rejected Claim Repurchases
 
-    
-  
Cumulative Rejected Claim Repurchases
 
$
184,693.81
   
$
184,693.81
 
Unpaid Primary Servicing Fees
   
-
     
-
 
Unpaid Administration Fees
   
-
     
-
 
Unpaid Carryover Servicing Fees
   
-
     
-
 
Note Principal Shortfall
   
-
     
-
 
Note Interest Shortfall
   
-
     
-
 
Unpaid Interest Carryover
   
-
     
-
 
Non-Cash Principal Activity - Capitalized Interest
 
$
720,969.68
   
$
723,251.09
 
Borrower Interest Accrued
 
$
1,010,347.31
   
$
1,060,586.68
 
Interest Subsidy Payments Accrued
 
$
38,242.01
   
$
39,522.65
 
Special Allowance Payments Accrued
 
$
97,922.60
   
$
104,184.12
 

Page 5 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

V.
2015-3 Portfolio Statistics by School and Program

A
LOAN TYPE
 
Weighted
Average Coupon
   
# LOANS
   
$ AMOUNT
     
%*

 
- GSL (1) - Subsidized
   
6.69%

   
7,520
     
36,823,237.90
     
18.816%

 
- GSL - Unsubsidized
   
6.76%

   
6,372
     
51,289,762.74
     
26.209%

 
- PLUS (2) Loans
   
8.43%

   
255
     
5,729,873.20
     
2.928%

 
- SLS (3) Loans
   
7.28%

   
14
     
147,096.83
     
0.075%

 
- Consolidation Loans
   
6.27%

   
4,204
     
101,708,337.09
     
51.972%

 
Total
   
6.55%

   
18,365
   
$
195,698,307.76
     
100.000%


B
SCHOOL TYPE

Weighted
Average Coupon


# LOANS


$ AMOUNT



%*

 
- Four Year
   
6.84%

   
11,420
     
80,362,376.05
     
41.064%

 
- Two Year
   
6.83%

   
2,104
     
10,496,657.61
     
5.364%

 
- Technical
   
6.83%

   
624
     
3,140,955.01
     
1.605%

 
- Other
   
6.27%

   
4,217
     
101,698,319.09
     
51.967%

 
Total
   
6.55%

   
18,365
   
$
195,698,307.76
     
100.000%


*Percentages may not total 100% due to rounding.

(1)
Guaranteed Stafford Loan

(2)
Parent Loans for Undergraduate Students

(3)
Supplemental Loans to Students.  The Unsubsidized Stafford Loan program replaced the SLS program on July 1, 1994.

Page 6 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

VI.
2015-3 Waterfall for Distributions

     
Paid
   
Remaining
Funds Balance
 
Total Available Funds
       
$
2,200,028.78
 
A
Trustee Fees
 
-
   
$
2,200,028.78
 
B
Primary Servicing Fee
 
$
38,525.91
   
$
2,161,502.87
 
C
Administration Fee
 
$
6,667.00
   
$
2,154,835.87
 
D
Class A Noteholders' Interest Distribution Amount
 
$
625,350.86
   
$
1,529,485.01
 
E
Class B Noteholders' Interest Distribution Amount
 
$
84,738.64
   
$
1,444,746.37
 
F
Reserve Account Reinstatement
   
-
   
$
1,444,746.37
 
G
Class A Noteholders' Principal Distribution Amount
 
$
1,216,677.01
   
$
228,069.36
 
H
Class B Noteholders' Principal Distribution Amount
   
-
   
$
228,069.36
 
I
Class A Noteholders' Accelerated Principal Distribution Amount
   
-
   
$
228,069.36
 
J
Class B Noteholders' Accelerated Principal Distribution Amount
   
-
   
$
228,069.36
 
K
Unpaid Expenses of The Trustees
   
-
   
$
228,069.36
 
L
Carryover Servicing Fee
   
-
   
$
228,069.36
 
M
Remaining Amounts to the Noteholders after the first auction date
   
-
   
$
228,069.36
 
N
Excess Distribution Certificateholder
 
$
228,069.36
    $
(0.00)
 

Waterfall Triggers
     
A
Student Loan Principal Outstanding
 
$
195,698,307.76
 
B
Interest to be Capitalized
 
$
2,130,591.66
 
C
Capitalized Interest Account Balance
   
-
 
D
Reserve Account Balance (after any reinstatement)
 
$
752,636.00
 
E
Less:  Specified Reserve Account Balance
 
$
(752,636.00)

F
Total
 
$
197,828,899.42
 
G
Class A Notes Outstanding (after application of available funds)
 
$
174,828,899.42
 
H
Insolvency Event or Event of Default Under Indenture
    N

I
Available Funds Applied to Class A Noteholders’ Distribution Amount Before Any Amounts are Applied to the Class B Noteholders’ Distribution Amount (G>F or H=Y)
    N



Page 7 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

VII.
2015-3 Distributions

Distribution Amounts

   
A2
    B

Cusip/Isin
 
63939LAB3
   
63939LAC1
 
Beginning Balance
 
$
176,045,576.43
   
$
20,000,000.00
 
Index
 
SOFR
   
SOFR
 
Spread/Fixed Rate
   
0.65%

   
1.50%

Record Date (Days Prior to Distribution)
 
1 NEW YORK BUSINESS DAY
   
1 NEW YORK BUSINESS DAY
 
Accrual Period Begin
 
4/27/2026
   
4/27/2026
 
Accrual Period End
 
5/26/2026
   
5/26/2026
 
Daycount Fraction
   
0.08055556
     
0.08055556
 
Interest Rate*
   
4.40964%

   
5.25964%

Accrued Interest Factor
   
0.003552210
     
0.004236932
 
Current Interest Due
 
$
625,350.86
   
$
84,738.64
 
Interest Shortfall from Prior Period Plus Accrued Interest
   
-
     
-
 
Total Interest Due
 
$
625,350.86
   
$
84,738.64
 
Interest Paid
 
$
625,350.86
   
$
84,738.64
 
Interest Shortfall
   
-
     
-
 
Principal Paid
 
$
1,216,677.01
     
-
 
Ending Principal Balance
 
$
174,828,899.42
   
$
20,000,000.00
 
Paydown Factor
   
0.002503451
     
0.000000000
 
Ending Balance Factor
   
0.359730246
     
1.000000000
 

* Pay rates for Current Distribution.  For the interest rates applicable to the next distribution date, please see https://images.navient.com/investors/data/abrate.txt.

Page 8 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026

VIII.
2015-3 Reconciliations

A
Principal Distribution Reconciliation
     
 
Notes Outstanding Principal Balance
 
$
196,045,576.43
 
 
Adjusted Pool Balance
 
$
197,828,899.42
 
 
Overcollateralization Amount
 
$
3,000,000.00
 
 
Principal Distribution Amount
 
$
1,216,677.01
 
 
Principal Distribution Amount Paid
 
$
1,216,677.01
 
           
B
Reserve Account Reconciliation
       
 
Beginning Period Balance
 
$
752,636.00
 
 
Reserve Funds Utilized
   
0.00
 
 
Reserve Funds Reinstated
   
0.00
 
 
Balance Available
 
$
752,636.00
 
 
Required Reserve Acct Balance
 
$
752,636.00
 
 
Release to Collection Account
 

-  
 
Ending Reserve Account Balance
 
$
752,636.00
 
           
C
Floor Income Rebate Account
       
 
Beginning Period Balance
 
$
166,656.17
 
 
Deposits for the Period
 
$
84,154.97
 
 
Release to Collection Account
   
-
 
 
Ending Balance
 
$
250,811.14
 
           
D
Supplemental Purchase Account
       
 
Beginning Period Balance
   
-
 
 
Supplemental Loan Purchases
   
-
 
 
Transfers to Collection Account
   
-
 
 
Ending Balance
   
-
 


Page 9 of 9
Trust 2015-3 Monthly Servicing Report: Collection Period 04/01/2026 - 04/30/2026, Distribution Date 05/26/2026