Semifinal 3
lundi 30 septembre 2019, 19h50 GMT – 19h50 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Andre De Grasse | Canada | 20.08″ |
| 2 |  Kyle Greaux | Trinidad & Tobago | + 0.16″ |
| 3 |  Zharnel Hughes | Great Britain | + 0.22″ |
| 4 |  Taymir Burnet | Netherlands | + 0.26″ |
| 5 |  Anaso Jobodwana | South Africa | + 0.26″ |
| 6 |  Yohan Blake | Jamaica | + 0.29″ |
| 7 |  Reynier Mena | Cuba | + 0.53″ |
| 8 |  Divine Oduduru | Nigeria | + 0.76″ |