First 2 in each heat (Q) and the next 2 fastest (q)

First 2 of each heat (WQ) plus 2 fastest times (Wq) qualify to World Athletics Championships and World Athletics Relays Final

POS Rank Heat BIB ATHLETE COUNTRY RESULTS
1 1 3 GBR Great Britain & NI GBRGBR 3:21.28 WQ WL
2 2 3 NOR Norway NORNOR 3:22.78 WQ NR
3 1 2 CAN Canada CANCAN 3:23.52 WQ SB
4 1 1 ESP Spain ESPESP 3:24.44 WQ SB
5 2 2 ITA Italy ITAITA 3:24.46 WQ SB
6 3 3 NED Netherlands NEDNED 3:24.74 Wq SB
7 2 1 CZE Czechia CZECZE 3:25.42 WQ SB
8 3 1 GER Germany GERGER 3:25.76 Wq SB
9 4 3 RSA South Africa RSARSA 3:26.77 SB
10 4 1 FRA France FRAFRA 3:26.89 SB
11 5 1 JAM Jamaica JAMJAM 3:27.19 SB
12 5 3 AUS Australia AUSAUS 3:27.44 SB
13 3 2 POL Poland POLPOL 3:27.62
14 4 2 IRL Ireland IRLIRL 3:29.93 SB
15 5 2 BOT Botswana BOTBOT 3:30.12 SB
16 6 1 NGR Nigeria NGRNGR 3:30.71 SB
17 7 1 BRA Brazil BRABRA 3:31.59 SB
18 6 2 BEL Belgium BELBEL 3:32.04 SB
19 7 2 ETH Ethiopia ETHETH 3:33.18 NR
20 6 3 SUI Switzerland SUISUI 3:34.37 SB
21 8 2 KEN Kenya KENKEN 3:35.90 SB
22 7 3 MEX Mexico MEXMEX 3:39.61