| | Final 21:43 | time | gap | L | pts | _______ | | 1. |  Australia | 3:10.16 | | 5 | 970 | | | | Jack Cartwright 47.84s, Flynn Southam 1:35.69, Kai James Taylor 2:23.60, Kyle Chalmers 3:10.16 | | 2. |  Italy | 3:10.49 | +0.33s | 3 | 964 | | | | Alessandro Miressi 47.54s, Manuel Frigo 1:35.33, Lorenzo Zazzeri 2:23.46, Thomas Ceccon 3:10.49 | | 3. |  United States | 3:10.81 | +0.65s | 4 | 960 | | | | Ryan Held 48.16s, Jack Alexy 1:35.72, Chris Guiliano 2:23.49, Matt King 3:10.81 | | 4. |  China | 3:11.38 | AS +1.22s | 2 | 951 | | | | Zhanle Pan 47.67s, Juner Chen 1:35.52, Changhao Wang 2:24.41, Haoyu Wang 3:11.38 | | 5. |  Canada | 3:12.05 | +1.89s | 6 | 941 | | | | Josh Liendo 48.17s, Ruslan Gaziev 1:35.47, Finlay Knox 2:24.17, Javier Acevedo 3:12.05 | | 6. |  Brazil | 3:12.71 | +2.55s | 1 | 932 | | | | Marcelo Chierighini 48.84s, Guilherme Santos 1:35.60, Felipe Souza 2:24.00, Victor Alcara 3:12.71 | | 7. |  Israel | 3:14.53 | +4.37s | 8 | 906 | | | | Tomer Frankel 48.43s, Denis Loktev 1:36.89, Ron Polonsky 2:25.96, Gal Cohen Groumi 3:14.53 | | 8. |  Spain | 3:14.64 | +4.48s | 7 | 904 | | | | Sergio De Celis Montalban 48.77s, Luis Dominguez 1:37.24, Mario Molla Yanes 2:26.10, Cesar Castro 3:14.64 | | | Final 21:23 | time | gap | L | pts | _______ |
| World Record: United States 3:08.24 Beijing, China 11 August 2008 | | World Championship Record: United States 3:09.06 Gwangju, South Korea 21 July 2019 |
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Heats - Sunday, 23rd July 13:14 | | Best 8 times advanced to Final. |
| | Heat 3 13:25 | time | gap | L | pts | _______ | | 1. | United States | 3:11.63 | | 4 | 947 | 1. | | | Chris Guiliano 48.30s, Destin Lasco 1:36.25, Matt King 2:23.75, Justin Ress 3:11.63 | | 2. | Australia | 3:11.64 | +0.01s | 5 | 947 | 2. | | | Jack Cartwright 48.29s, Matthew Temple 1:36.48, Kai James Taylor 2:24.07, Flynn Southam 3:11.64 | | 3. | China | 3:13.54 | +1.91s | 7 | 920 | 5. | | | Haoyu Wang 48.37s, Juner Chen 1:36.63, Jintong Yang 2:26.17, Zhanle Pan 3:13.54 | | 4. | Brazil | 3:13.82 | +2.19s | 6 | 916 | 7. | | | Marcelo Chierighini 48.87s, Guilherme Santos 1:36.71, Felipe Souza 2:25.05, Victor Alcara 3:13.82 | | 5. |  Serbia | 3:14.36 | +2.73s | 2 | 908 | 10. | | | Velimir Stjepanovic 48.76s, Andrej Barna 1:36.44, Nikola Acin 2:25.45, Uros Nikolic 3:14.36 | | 6. |  Hungary | 3:14.42 | +2.79s | 3 | 907 | 11. | | | Nandor Nemeth 48.20s, Szebasztian Szabo 1:36.63, Daniel Meszaros 2:25.59, Hubert KOS 3:14.42 | | 7. |  France | 3:14.54 | +2.91s | 8 | 905 | 12. | | | Hadrien Salvan 48.70s, Max Berg 1:37.32, Guillaume Guth 2:26.26, Florent Manaudou 3:14.54 | | 8. |  Japan | 3:14.84 | +3.21s | 9 | 901 | 13. | | | Katsuhiro Matsumoto 48.54s, Masahiro Kawane 1:37.89, Tomonobu Gomi 2:26.74, Katsumi Nakamura 3:14.84 | | 9. |  Greece | 3:15.86 | +4.23s | 0 | 887 | 15. | | | Andreas Vazaios 49.18s, Apostolos Christou 1:38.48, Odyssefs Meladinis 2:27.47, Kristian Gkolomeev 3:15.86 | | 10. |  South Korea | 3:16.15 | +4.52s | 1 | 883 | 17. | | | Hojoon Lee 49.21s, Yuchan Ji 1:38.02, Jaehoon Yang 2:27.10, Jihun KIM 3:16.15 |
| | Heat 2 13:19 | time | gap | L | pts | _______ | | 1. | Italy | 3:12.53 | +0.90s | 4 | 934 | 3. | | | Alessandro Miressi 48.10s, Leonardo Deplano 1:36.52, Lorenzo Zazzeri 2:24.43, Manuel Frigo 3:12.53 | | 2. | Canada | 3:13.49 | +1.86s | 3 | 920 | 4. | | | Ruslan Gaziev 48.38s, Javier Acevedo 1:36.93, Edouard Fullum-Huot 2:25.89, Josh Liendo 3:13.49 | | 3. | Spain | 3:13.77 | +2.14s | 6 | 916 | 6. | | | Sergio De Celis Montalban 48.81s, Luis Dominguez 1:37.20, Mario Molla Yanes 2:25.83, Cesar Castro 3:13.77 | | 4. | Israel | 3:14.03 | +2.40s | 2 | 913 | 8. | | | Denis Loktev 49.10s, Tomer Frankel 1:37.11, Ron Polonsky 2:25.94, Gal Cohen Groumi 3:14.03 | | 5. |  Germany | 3:14.04 | +2.41s | 0 | 912 | 9. | | | Rafael Miroslaw 49.11s, Josha Salchow 1:37.03, Luca Armbruster 2:25.85, Peter Varjasi 3:14.04 | | 6. |  Poland | 3:15.55 | +3.92s | 1 | 891 | 14. | | | Kamil Sieradzki 49.06s, Kacper Stokowski 1:38.07, Adrian Jaskiewicz 2:27.69, Ksawery Masiuk 3:15.55 | | 7. |  Sweden | 3:16.07 | +4.44s | 7 | 884 | 16. | | | Bjoern Seeliger 49.07s, Robin Hanson 1:37.84, Elias Persson 2:27.31, Isak Eliasson 3:16.07 | | 8. |  Singapore | 3:17.89 | +6.26s | 8 | 860 | 18. | | | Zheng Wen Quah 49.68s, Jonathan Eu Jin TAN 1:38.30, Mikkel LEE 2:27.64, Glen Jun Wei LIM 3:17.89 | | 9. |  Vietnam | 3:27.63 | +16.00s | 9 | 745 | 21. | | | Quy Phuoc Hoang 51.32s, Jeremie Loic Nino Luong 1:42.08, Hung Nguyen Tran 2:34.54, Quang Thuan Nguyen 3:27.63 | | -. |  Great Britain | 3:10.47 | DSQ | 5 | - | | | | Lewis Edward Burras 48.61s, Matthew Richards 1:35.50, Jacob Henry Whittle 2:22.87, Duncan Scott 3:10.47 |
| | Heat 1 13:14 | time | gap | L | pts | _______ | | 1. |  Venezuela | 3:25.11 | +13.48s | 4 | 772 | 19. | | | Alberto Mestre 50.21s, Emil Jose Perez Avila 1:41.60, Jorge Eliezer Otaiza Hernandez 2:32.42, Alfonso Enrique Mestre Vivas 3:25.11 | | 1. |  Thailand | 3:27.18 | +15.55s | 5 | 750 | 20. | | | Dulyawat Kaewsriyong 51.11s, Navaphat Wongcharoen 1:43.23, Ratthawit Thammananthachote 2:35.73, Tonnam Kanteemool 3:27.18 | | -. |  Mexico | DNS | | 3 | | |
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