Semifinal
samedi 28 septembre 2019, 17h05 GMT – 17h05 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Karsten Warholm | Norway | 48.28″ |
| 2 | Alison Dos Santos | Brazil | + 0.07″ |
| 3 |  Yasmaní Copello | Turkey | + 0.11″ |
| 4 | Abdelmalik Lahoulou | Algeria | + 0.11″ |
| 5 | Rai Benjamin | United States | + 0.24″ |
| 6 | TJ Holmes | United States | + 0.39″ |
| 7 | Abderrahman Samba | Qatar | + 0.44″ |
| 8 | Rasmus Mägi | Estonia | + 0.65″ |
| 9 |  Takatoshi Abe | Japan | + 0.69″ |
| 10 | Thomas Barr | Ireland | + 0.74″ |
| 11 |  Ludvy Vaillant | FFA - France Athlétisme | + 0.82″ |
| 12 | Mohamed Touati | Tunisia | + 0.86″ |
| 13 | Chris McAlister | Great Britain | + 0.9″ |
| 14 | Amere Lattin | United States | + 0.92″ |
| 15 |  Kemar Mowatt | Jamaica | + 1.04″ |
| 16 | Jabir Madari Pillyalil | India | + 1.43″ |
| 17 | Fernando Vega | Mexico | + 1.68″ |
| 18 | Vít Müller | Czech Republic | + 1.69″ |
| 19 | Chieh Chen | Chinese Taipei | + 1.72″ |
| 20 |  Luke Campbell | Germany | + 1.72″ |
| 21 |  Patryk Dobek | Poland | + 1.9″ |
| 22 | Masaki Toyoda | Japan | + 2.02″ |
| 23 | Rilwan Alowonle | Nigeria | + 3.73″ |
| Kyron McMaster | British Virgin Islands | DQ |