Semifinal
mardi 7 août 2018, 19h52 GMT – 19h59 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Karsten Warholm | Norway | 48.67″ |
| 2 |  Patryk Dobek | Poland | + 0.08″ |
| 3 | Rasmus Mägi | Estonia | + 0.13″ |
| 4 |  Yasmaní Copello | Turkey | + 0.21″ |
| 4 |  Ludvy Vaillant | FFA - France Athlétisme | + 0.21″ |
| 6 | Timofey Chalyy | Authorised Neutral Athlete | + 0.22″ |
| 7 | Thomas Barr | Ireland | + 0.43″ |
| 8 | Sergio Fernández | Spain | + 0.52″ |
| 9 |  Luke Campbell | Germany | + 0.53″ |
| 10 | Tibor Koroknai | Hungary | + 0.57″ |
| 11 | Victor Coroller | FFA - France Athlétisme | + 0.67″ |
| 12 | Lorenzo Vergani | Italy | + 0.74″ |
| 13 | Muhammad Abdalla Kounta | FFA - France Athlétisme | + 0.91″ |
| 14 | Mate Koroknai | Hungary | + 1.1″ |
| 15 | Jack Green | Great Britain | + 1.17″ |
| 16 | José Bencosme de Leon | Italy | + 1.19″ |
| 17 | Denys Nechyporenko | Ukraine | + 1.6″ |
| 18 | Martin Kucera | Slovakia | + 1.63″ |
| 19 | Michal Brož | Czech Republic | + 1.64″ |
| 20 | Maksims Sincukovs | Latvia | + 1.66″ |
| 21 | Jaak-Heinrich Jagor | Estonia | + 1.74″ |
| 22 | Alain-Hervé Mfomkpa | Switzerland | + 2.04″ |
| 23 | Emir Bekric | Serbia | + 2.29″ |
| Aleksandr Skorobogatko | Authorised Neutral Athlete | DNF |