400 meter Men Semi Final, Heat:3 of 3 ; Official result since 15:57
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 51 | NDORI Bayapo | 44.88 | BOT | Senior | 46.48 | Q | |
| 2 | 3 | 385 | BOCK Mahhad Alexander | 45.8 | NAM | Senior | 46.72 | Q | |
| 3 | 6 | 579 | LUCHEMBE Kennedy | 45.76 | ZAM | Senior | 46.74 | q | |
| 4 | 2 | 247 | COLLINS Gichana | KEN | Senior | 47.14 | |||
| 5 | 7 | 512 | ISAACS Gardeo | 46.22 | RSA | Senior | 47.69 | ||
| 6 | 8 | 208 | WEGI Yobsan Biru | 45.89 | ETH | Senior | 47.96 | ||
| 7 | 1 | 427 | NNAMANI Johnson | 45.6 | NGR | Senior | 48.21 | ||
| 5 | 528 | SHEZI Tumisang | 46 | RSA | Senior | DNF |