400m National Women, Heat:3 of 3 ; Official result since 18:37
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 182 | BOUCHARD MAITE | CAN | Sen | 54.09 | |||
| 2 | 5 | 188 | SINEAD DENNY | IRL | Sen | 54.69 | |||
| 3 | 3 | 185 | MANLEY MEGHAN | USA | Sen | 55.25 | |||
| 4 | 2 | 187 | PROPP ADREA | CAN | Sen | 55.56 | |||
| 5 | 7 | 178 | PIERONI MESSALINA | LOOI | Sen | 56.55 | |||
| 6 | 8 | 177 | HARRIS TAMARA | CAN | Sen | 56.69 | |||
| 7 | 1 | 180 | TATE ALAINE | USA | Sen | 57.07 | |||
| 8 | 6 | 189 | VENINGA DOMINIQUE | NED | Sen | 57.47 |