Group A of the men's football tournament at the 2025 SEA Games will be played from 3 to 11 December 2025. [1] The group consisted of hosts Thailand, Cambodia, and Timor-Leste. [2]
| Draw position | Team | SEA Games appearance | Last appearance | Previous best performance |
|---|---|---|---|---|
| A1 |  Thailand | 33rd | 2023 | Gold medalists (1965, 1975, 1981, 1983, 1985, 1965, 1995, 1997, 1999, 2001, 2003, 2005, 2007, 2013, 2015, 2017) |
| A2 |  Singapore | 22nd | 2023 | Silver medalists (1983, 1985, 1989) |
| A3 |  Timor-Leste | 9th | 2023 | Sixth place (2011) |
| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | Qualification |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Thailand (H) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Advance to knockout stage |
| 2 | Timor-Leste | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Possible knockout stage based on rankings |
| 3 | Singapore | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Fair play points would have been used as a tiebreaker if the overall and head-to-head records of teams were tied. These were calculated based on yellow and red cards received in all group matches as follows:
Only one of the above deductions could be applied to a player in a single match.
| Team | Match 1 | Match 2 | Match 3 | Points | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |  |  | | | | | | | | | | ||
| Thailand | 0 | ||||||||||||
| Singapore | 0 | ||||||||||||
| Timor-Leste | 0 | ||||||||||||