v3.26.1
Shareholder Report
6 Months Ended
Mar. 31, 2026
USD ($)
Holdings
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Tidal Trust III
Entity Central Index Key 0001722388
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Ned Davis Research 360 Dynamic Allocation ETF  
Shareholder Report [Line Items]  
Fund Name Ned Davis Research 360° Dynamic Allocation ETF
Class Name Ned Davis Research 360° Dynamic Allocation ETF
Trading Symbol NDAA
Security Exchange Name NASDAQ
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Ned Davis Research 360° Dynamic Allocation ETF (the "Fund") for the period October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.ndrfunds.com. You can also request this information by contacting us at (844) 954-5050 or by writing to Ned Davis Research 360° Dynamic Allocation ETF, c/o U.S. Bank Global Fund Services, P.O. Box 701, Milwaukee, Wisconsin 53201‑0701.
Additional Information Phone Number (844) 954-5050
Additional Information Website www.ndrfunds.com
Expenses [Text Block]

What were the Fund costs for the past six months?
(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Ned Davis Research 360° Dynamic Allocation ETF
$25
0.50%

Costs paid as a percentage of investment are annualized.

Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50%
Net Assets $ 3,039,000
Holdings Count | Holdings 9
Advisory Fees Paid, Amount $ 7,332
Investment Company, Portfolio Turnover 35.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of March 31, 2026)

Fund Size (Thousands)
$3,039
Number of Holdings
9
Total Advisory Fee Paid
$7,332
Portfolio Turnover Rate
35%

 

Holdings [Text Block]

Sector/Security Type - Investments


(% of total net assets)

sector
%
Exchange-Traded Funds
0.985
Cash & Cash Equivalents
0.015
bar

Percentages are based on total net assets. Cash & Cash Equivalents represents short-term investments and assets in excess of other liabilities.

Largest Holdings [Text Block]

What did the Fund invest in?

(as of March 31, 2026)

Top Holdings
(% of total net assets)
iShares Core MSCI Emerging Markets ETF
16.5
Vanguard S&P 500 ETF
16.3
iShares Core MSCI EAFE ETF
15.6
iShares Core U.S. Value ETF
13.1
abrdn Bloomberg All Commodity Strategy K-1 Free ETF
11.9
Vanguard Growth ETF
10.4
SPDR Bloomberg 1-3 Month
T-Bill ETF
9.7
iShares Core S&P Small-Cap ETF
5.0