Semifinal 3
mercredi 2 octobre 2019, 19h35 GMT – 19h35 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Machel Cedenio | Trinidad & Tobago | 44.41″ |
| 2 |  Anthony José Zambrano | Colombia | + 0.14″ |
| 3 | Akeem Bloomfield | Jamaica | + 0.36″ |
| 4 | Julian Walsh | Japan | + 0.72″ |
| 5 | Rabah Yousif | Great Britain | + 0.74″ |
| 6 | Alphas Leken Kishoyian | Kenya | + 1.14″ |
| 7 |  Michael Norman | United States | + 1.53″ |
| Yousef Karam | Kuwait | DNS |