The Olympic Council of Asia (OCA) has rubber-stamped the move after news of the postponement was leaked earlier this month.
New dates of between November 17 and 26 in 2023 have been set for the event, which will be co-hosted by Thai capital Bangkok and Chonburi.
The sixth edition of the Games was due to be held between March 10 and 19 next year.
An OCA statement said the delay followed a request from the Thailand National Olympic Committee.
The Games have now been moved twice as they were originally due to be held in May.