Heat 3
dimanche 21 juillet 2019, 03h00 GMT – 03h00 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katinka Hosszú | Hungary | 2′ 7.02″ |
| 2 |  Shiwen Ye | China | + 2.43″ |
| 3 | Kelsey Wog | Canada | + 3.52″ |
| 4 | Ella Eastin | United States | + 4.04″ |
| 5 |  Fantine Lesaffre | France | + 5.32″ |
| 6 | Zsuzsanna Jakabos | Hungary | + 6.27″ |
| 7 | Aimee Willmott | Great Britain | + 6.88″ |
| 8 | Victoria Kaminskaya | Portugal | + 6.95″ |
| 9 | McKenna DeBever | Peru | + 9.95″ |
| 10 | Claudia Gâdea | Romania | + 12.01″ |