| | Final | time | | gap | L | | 1. |  Belgium | 3:02.54 | WL | | 5 | | | Jonathan Sacoor 46.21 2., Dylan Borlée 45.67s 2., Christian Iguacel 45.78s 2., Alexander Doom 44.88s | | 2. |  United States | 3:02.60 | SB | +0.06s | 6 | | | Jacory Patterson 45.97s, Matthew Boling 45.63s 1., Noah Lyles 45.68s 1., Christopher Bailey 45.32s 2. | | 3. |  Netherlands | 3:04.25 | NR | +1.71s | 4 | | | Liemarvin Bonevacia 46.45s 3., Ramsey Angela 46.20s 3., Terrence Agard 46.13s 3., Tony van Diepen 45.47s 3. | | 4. |  Kenya | 3:06.71 | AR | +4.17s | 2 | | | Wiseman Mukhobe 47.50s, Zablon Ekwam 46.55 4., Kelvin Tauta 46.87s, Boniface Mweresa 45.79s | | 5. |  Poland | 3:08.00 | | +5.46s | 1 | | | Maksymilian Swed 47.25s 4., Jan Wawrzkowicz 47.58s 6., Daniel Sołtysiak 47.02s 6., Mateusz Rzeźniczak 46.15s 5. | | -. |  Portugal | TR48.1[3] | DQ | | 3 | | | Ericsson Tavares 47.71s 6., João Coelho 46.66s 5., Ricardo dos Santos 46.80s 4., Omar Elkhatib 46.85s |
| World Record: Houston, United States 3:10.51 Clemson, SC, United States 9th February 2019 | | Championship Record: Poland 3:01.77 Birmingham, Great Britain 4th March 2018 |
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Heats - Sunday 03.03.2024 | | First 2 and Best 2 best times advanced to Final. |
| | Heat 1 | time | | L | | 1. | United States | 3:05.56 | Q | 6 | | | Paul Dedewo, Trevor Bassitt, Matthew Boling, Christopher Bailey | | 2. | Belgium | 3:06.27 | Q, SB | 5 | | | Jonathan Sacoor, Christian Iguacel, Tibo De Smet, Dylan Borlée | | 6. | Kenya | 3:06.96 | q, AR | 5 | | | Wiseman Mukhobe, Zablon Ekwam, Kelvin Tauta, Boniface Mweresa | | 7. |  Slovakia | 3:09.21 | NR | 6 | | | ŀimon Bujna, Patrik Dömötör, Miroslav Marček, Mário Hanic |
| | Heat 2 | time | | L | | 3. | Netherlands | 3:06.47 | Q, SB | 4 | | | Taymir Burnet, Isaya Klein Ikkink, Tony van Diepen, Ramsey Angela | | 4. | Portugal | 3:06.57 | Q, NR | 5 | | | Ericsson Tavares, Ricardo dos Santos, João Coelho, Omar Elkhatib | | 5. | Poland | 3:06.74 | q, SB | 4 | | | Patryk Grzegorzewicz, Maksymilian Swed, Daniel Sołtysiak, Mateusz Rzeźniczak | | -. |  Czechia | DNF | | 6 | | | Vít Müller, Michal Desenský, Patrik ŀorm, Matěj Krsek |
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