4 x 400 m Relay, Men
| Competition | 2021 South-East Asian Games (SEA Games) |
|---|---|
| Venue |
Hanoi
 VIE
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Thailand |  THA |
3:07.58 | ||
| Apisit Chamsri | — | ||||
| Siripol Punpa | — | ||||
| Ruamchok Semathong | — | ||||
| Joshua Atkinson | — | ||||
| 🥈 | Vietnam | VIE |
3:08.52 | ||
| Lê Ngọc Phúc | — | ||||
| Trần Đình Sơn | — | ||||
| Trần Nhật Hoàng | — | ||||
| Quách Công Lịch | — | ||||
| 🥉 | Singapore |  SGP |
3:11.09 | ||
| Calvin Quek | — | ||||
| Thiruben Thana Rajan | — | ||||
| Reuben Rainer Lee | — | ||||
| Tan Zong Yang | — |