| Date | 9 October 2018 |
|---|---|
| Location | Natatorium, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires |
| Pos | Competitor | NOC | Time | |||
|---|---|---|---|---|---|---|
| 1 | Kliment Kolesnikov |  RUS | 24.74 | |||
| 2 | Tomoe Hvas |  NOR | 26.14 | |||
| 3 | Lewis Blackburn |  AUS | 26.29 | |||
| 4 | Abdellah Ardjoune |  ALG | 26.38 | |||
| 5 | Arijus Pavlidi |  LTU | 26.46 | |||
| 6 | Marvin Miglbauer |  AUT | 26.50 | |||
| 7 | Ethan Harder |  USA | 26.84 | |||
| 8 | Hendrik Duvenhage |  RSA | 26.97 |
