Heats
mercredi 8 août 2018, 12h05 GMT – 12h25 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Jake Wightman | Great Britain | 3′ 40.73″ |
| 2 |  Marcin Lewandowski | Poland | + 0.01″ |
| 3 | Charlie Da'Vall Grice | Great Britain | + 0.07″ |
| 4 |  Jakob Ingebrigtsen | Norway | + 0.08″ |
| 5 | Joao Bussotti Neves | Italy | + 0.14″ |
| 6 |  Filip Ingebrigtsen | Norway | + 0.15″ |
| 7 | Simas Bertašius | Lithuania | + 0.22″ |
| 8 | Timo Benitz | Germany | + 0.28″ |
| 9 |  Ismael Debjani | Belgium | + 0.36″ |
| 10 | Mohad Abdikadar Sheikh Ali | Italy | + 0.36″ |
| 11 | Kalle Berglund | Sweden | + 0.52″ |
| 12 | Simon Denissel | FFA - France Athlétisme | + 0.94″ |
| 13 | Elmar Engholm | Sweden | + 1.28″ |
| 14 | Marius Probst | Germany | + 1.64″ |
| 15 | Isaac Kimeli | Belgium | + 2.04″ |
| 16 | Jan Hochstrasser | Switzerland | + 2.07″ |
| 17 |  Adrián Ben | Spain | + 2.08″ |
| 18 | Tamás Kazi | Hungary | + 2.25″ |
| 19 | Amine Khadiri | Cyprus | + 5.24″ |
| 20 | Chris O'Hare | Great Britain | + 8.33″ |
| 21 | Homiyu Tesfaye | Germany | + 8.55″ |
| 22 |  Henrik Ingebrigtsen | Norway | + 8.81″ |
| 23 | Johan Rogestedt | Sweden | + 9″ |
| 24 | Jakub Holuša | Czech Republic | + 9.09″ |
| 25 | Charles Grethen | Luxembourg | + 9.24″ |
| 26 | Ferdinand Kvan Edman | Norway | + 9.53″ |
| 27 |  Baptiste Mischler | FFA - France Athlétisme | + 10.23″ |
| 28 |  Alexis Miellet | FFA - France Athlétisme | + 10.88″ |
| 29 | Volodymyr Kyts | Ukraine | + 12.04″ |
| 30 | Peter Callahan | Belgium | + 13.5″ |
| 31 | Benjamin Kovács | Hungary | + 13.56″ |
| 32 | Harvey Dixon | Gibraltar | + 13.97″ |
| 33 | Dario Ivanovski | North Macedonia | + 16.79″ |
| 34 | Carles Gómez | Andorra | + 19.29″ |