Timor-Leste participated at the 33rd Southeast Asian (SEA) Games which was held from 9 to 20 December 2025 in Bangkok and Chonburi in Thailand. This was the first time that the country participated in the Games after it gained full ASEAN membership.
The delegation consisted of 110 athletes competing in 14 sports, down from 132 athletes that was initially reported.
The following is the list of the number of competitors participating at the Games per sport/discipline.