v3.26.1
Cover
 12 Months Ended
Mar. 31, 2026
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Financial Statement Error Correction [Flag] false
Document Shell Company Report false
Entity Interactive Data Current Yes
Document Accounting Standard U.S. GAAP
ICFR Auditor Attestation Flag false
Amendment Flag false
Document Period End Date Mar. 31, 2026
Document Fiscal Year Focus 2026
Document Fiscal Period Focus FY
Entity Information [Line Items]  
Entity Registrant Name   iOThree Limited  
Entity Central Index Key 0001997637
Entity File Number 001-42594
Entity Incorporation, State or Country Code E9
Current Fiscal Year End Date --03-31
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Shell Company false
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Incorporation, Date of Incorporation Aug. 21, 2023
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 161 Kallang Way
Entity Address, Address Line Two #07-01 and #07-08
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 349247
Entity Listings [Line Items]  
Title of 12(b) Security Ordinary Shares, par value $0.0625 per share
Trading Symbol IOTR
Security Exchange Name NASDAQ
Ordinary Shares  
Entity Listings [Line Items]  
Entity Common Stock, Shares Outstanding 2,296,566
Class A shares  
Entity Listings [Line Items]  
Entity Common Stock, Shares Outstanding 1,831,675
Business Contact [Member]  
Entity Contact Personnel [Line Items]  
Contact Personnel Name Eng Chye Koh
Contact Personnel Email Address ir@io3.sg
Entity Address, Address Line One 161 Kallang Way
Entity Address, Address Line Two #07-01 and #07-08
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 349247
Entity Phone Fax Numbers [Line Items]  
City Area Code +65
Local Phone Number 3105 1699