400 m Freestyle, Men
| Competition | 2017 South-East Asian Games (SEA Games) |
|---|---|
| Venue |
Kuala Lumpur
 MAS
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Welson Sim | MAS |
3:50.26 | ||
| 🥈 | Aflah Prawira |  INA |
3:54.15 | ||
| 🥉 | Nguyễn Hữu Kim Sơn |  VIE |
3:54.20 |