Semifinal
vendredi 2 mars 2018, 22h06 GMT – 22h06 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Oscar Husillos | Spain | 45.69″ |
| 2 |  Michael Cherry | United States | + 0.04″ |
| 3 |  Luguelín Santos | Dominican Republic | + 0.62″ |
| 4 |  Pavel Maslak | Czech Republic | + 0.63″ |
| 5 | Aldrich Bailey | United States | + 0.64″ |
| 6 | Deon Lendore | Trinidad & Tobago | + 0.64″ |
| 7 | Luka Janezic | Slovenia | + 0.68″ |
| 8 |  Rafal Omelko | Poland | + 0.7″ |
| 9 | Jakub Krzewina | Poland | + 1″ |
| 10 | Javon Francis | Jamaica | + 1.04″ |
| 11 | Juander Santos | Dominican Republic | + 1.14″ |
| 12 | Asa Guevara | Trinidad & Tobago | + 1.22″ |
| 13 | Patrik Sorm | Czech Republic | + 1.35″ |
| 14 | Lee Thompson | Great Britain | + 1.45″ |
| 15 | Lucas Búa | Spain | + 1.45″ |
| 16 | Mikhail Litvin | Kazakhstan | + 2.25″ |
| 17 |  Chidi Okezie | Nigeria | + 2.84″ |
| Yousef Karam | Kuwait | DNF |