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Heats - Friday, 19th August | | First 3 teams from each Heat and Best 2 times advenced to Final. |
| Rk | Heat 1 | time | | L | | 3. |  Great Britain | 38.41s | Q | 5 | |
Jeremiah Azu, Harry Aikines-Aryeetey, Jona Efoloko, Tommy Ramdhan | | 6. |  Netherlands | 38.83s | Q | 1 | |
Elvis Afrifa, Taymir Burnet, Joris Van Gool, Raphael Bouju | | 9. |  Switzerland | 39.03s | Q, SB | 7 | |
Pascal Mancini, Bradley Lestrade, Felix Svensson, Daniel Löhrer | | 11. |  Spain | 39.14s | | 6 | |
Alberto Calero, Pablo Montalvo, Jesús Gómez, Sergio López | | 13. |  Czechia | 39.41s | | 3 | |
Zdeněk Stromšík, Jiří Polák, Jan Jirka, David Kolář | | 14. |  Ukraine | 39.62s | SB | 8 | |
Serhiy Smelyk, Stanislav Kovalenko, Kyrylo Prykhodko, Andrii Vasyliev | | -. |  Ireland | DNF | | 2 | |
Israel Olatunde, Mark Smyth, Colin Doyle, Joseph Ojewumi |
| 1. |  Germany | 37.97s | Q, NR | 7 | |
Kevin Kranz, Joshua Hartmann, Owen Ansah, Lucas Ansah-Peprah | | 2. |  France | 38.17s | Q | 6 | |
Méba-Mickaël Zeze, Pablo Mateo, Ryan Zeze, Jimmy Vicaut | | 4. |  Poland | 38.60s | Q, SB | 4 | |
Dominik Kopeć, Przemysław Słowikowski, Patryk Wykrota, Mateusz Siuda | | 5. |  Belgium | 38.73s | q, NR | 5 | |
Robin Vanderbemden, Ward Merckx, Simon Verherstraeten, Kobe Vleminckx | | 7. |  Turkey | 38.98s | q | 3 | |
Emre Zafer Barnes, Jak Ali Harvey, Kayhan Özer, Ertan Özkan | | 8. |  Italy | 39.02s | | 1 | |
Lorenzo Patta, Hillary Wanderson Polanco Rijo, Matteo Melluzzo, Chituru Ali | | 12. |  Finland | 39.37s | | 2 | |
Santeri Örn, Samuli Samuelsson, Oskari Lehtonen, Samuel Purola | | -. |  Denmark | DNF | | 8 | |
Rasmus Thornbjerg Klausen, Frederik Schou-Nielsen, Tobias Larsen, Tazana Kamanga-Dyrbak |
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