| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 2235 | Kirani JAMES |
GRN |
43.88 Q SB |
| 2 | 2 | 1 | 1551 | Anthony José ZAMBRANO |
COL |
43.93 Q AR |
| 3 | 1 | 3 | 1136 | Steven GARDINER |
BAH |
44.14 Q SB |
| 4 | 1 | 2 | 3913 | Michael CHERRY |
USA |
44.44 Q |
| 5 | 2 | 3 | 3958 | Michael NORMAN |
USA |
44.52 Q |
| 6 | 3 | 3 | 1270 | Isaac MAKWALA |
BOT |
44.59 q |
| 7 | 3 | 1 | 3015 | Liemarvin BONEVACIA |
NED |
44.62 q NR |
| 8 | 2 | 2 | 2634 | Christopher TAYLOR |
JAM |
44.92 Q SB |
| 9 | 4 | 1 | 3633 | Deon LENDORE |
TTO |
44.93 |
| 10 | 5 | 1 | 2437 | Davide RE |
ITA |
44.94 SB |
| 11 | 4 | 3 | 2583 | Demish GAYE |
JAM |
45.09 SB |
| 12 | 5 | 3 | 3438 | Wayde VAN NIEKERK |
RSA |
45.14 |
| 13 | 3 | 2 | 1097 | Steven SOLOMON |
AUS |
45.15 |
| 14 | 6 | 1 | 3522 | Ricky PETRUCCIANI |
SUI |
45.26 |
| 15 | 7 | 1 | 3468 | Luka JANEŽIČ |
SLO |
45.36 SB |
| 16 | 4 | 2 | 2827 | Mazen Mawtan AL YASEN |
KSA |
45.37 |
| 17 | 6 | 3 | 3019 | Jochem DOBBER |
NED |
45.48 |
| 18 | 5 | 2 | 1274 | Leungo SCOTCH |
BOT |
45.56 |
| 19 | 7 | 3 | 3635 | Dwight ST. HILLAIRE |
TTO |
45.58 |
| 20 | 8 | 3 | 1154 | Jonathan JONES |
BAR |
45.61 |
| 21 | 6 | 2 | 3625 | Machel CEDENIO |
TTO |
45.86 |
| 22 | 8 | 1 | 1201 | Jonathan SACOOR |
BEL |
45.88 |
| 23 | 7 | 2 | 1137 | Alonzo RUSSELL |
BAH |
46.04 |