400m National Men, Heat:3 of 4 ; Official result since 19:20
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 134 | VAN OOST LOIC | AVR | Sen | 49.73 | |||
| 2 | 5 | 120 | BODART ANTOINE | SMAC | Sen | 51.34 | |||
| 3 | 2 | 123 | GNIRREP MARCO | SPA | Sen | 51.84 | |||
| 4 | 7 | 119 | AERSSENS DIETER | DCLA | Sen | 52.02 | |||
| 5 | 3 | 121 | DE CLERCK ARNE | RCT | Jun | 52.12 | |||
| 6 | 8 | 126 | LATINNE MATHYS | WS | Cad | 52.24 | |||
| 7 | 6 | 115 | ROUSSEAU NICOLAS | CABW | Cad | 54.52 |