Semifinal 3
samedi 28 septembre 2019, 17h05 GMT – 17h05 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Rai Benjamin | United States | 48.52″ |
| 2 | Abderrahman Samba | Qatar | + 0.2″ |
| 3 |  Takatoshi Abe | Japan | + 0.45″ |
| 4 | Thomas Barr | Ireland | + 0.5″ |
| 5 | Jabir Madari Pillyalil | India | + 1.19″ |
| 6 | Fernando Vega | Mexico | + 1.44″ |
| 7 | Vít Müller | Czech Republic | + 1.45″ |
| 8 | Rilwan Alowonle | Nigeria | + 3.49″ |