Heat 3
dimanche 30 juillet 2017, 10h00 GMT – 10h00 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katinka Hosszú | Hungary | 4′ 33.9″ |
| 2 |  Mireia Belmonte | Spain | + 1.39″ |
| 3 |  Elizabeth Beisel | United States | + 2.28″ |
| 4 | Sakiko Shimizu | Japan | + 2.53″ |
| 5 | Seo-Yeong Kim | Korea | + 5.9″ |
| 6 | Thi Anh Vien Nguyen | Vietnam | + 6.49″ |
| 7 | Min Zhou | China | + 8.36″ |
| 8 | Viktoria Günes | Turkey | + 8.37″ |
| 9 | Barbora Závadová | Czech Republic | + 12.85″ |
| 10 |  Anja Crevar | Serbia | + 14.63″ |