400m men, Heat:3 of 9 ; Official result
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 3 | 2385 | Jacobs Jasper | RAM | Sen | 51.15 | |||
| 2 | 1 | 2444 | De Clercq Anton | RCG | Sch | 52.17 | |||
| 3 | 5 | 2025 | De Wulf Robin | STAX | Sen | 52.99 | |||
| 4 | 8 | 3017 | De Prins Thomas | VAC | Sch | 53.01 | |||
| 5 | 4 | 1422 | Jara Alfaya Antonio* | WS | Sen | 53.08 | |||
| 6 | 7 | 408 | Stevens Tom | RCG | Jun | 53.09 | |||
| 7 | 6 | 404 | Dierickx Sebastiaan | RCG | Jun | 53.97 | |||
| 8 | 2 | 1189 | Marien Tristan | ACDL | Cad | 56.56 |