| Event: | Women's 50 metre freestyle S3 |
| Games: | 2012 Summer |
| Venue: | London Aquatics Centre |
| Dates: | 7 September |
| Competitors: | 9 |
| Nations: | 7 |
| Gold: | Jiangbo Xia |
| Goldnpc: | CHN |
| Silver: | Olga Sviderska |
| Silvernpc: | UKR |
| Bronze: | Patricia Valle |
| Bronzenpc: | MEX |
The women's 50 metre freestyle S3 event at the 2012 Paralympic Games took place on 7 September, at the London Aquatics Centre.
Two heats were held, one with four swimmers and one with five swimmers. The swimmers with the eight fastest times advance to the finals.
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 4 | Olga Sviderska | 48.64 | Q | ||
| 2 | 1 | 4 | Jiangbo Xia | 52.73 | Q | ||
| 3 | 2 | 5 | Patricia Valle | 59.04 | Q | ||
| 4 | 1 | 5 | Pin Xiu Yip | 1:00.52 | Q | ||
| 5 | 2 | 3 | Semicha Rizaoglou | 1:05.02 | Q | ||
| 6 | 1 | 3 | Annke Conradi | 1:05.51 | Q | ||
| 7 | 2 | 6 | Haideé Aceves | 1:07.89 | Q | ||
| 8 | 1 | 6 | Vera Thamm | 1:10.90 | Q | ||
| 9 | 2 | 2 | Esther Overton | 1:12.24 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | Jiangbo Xia | 48.11 | WR | |||
| 4 | Olga Sviderska | 48.39 | EU | |||
| 3 | Patricia Valle | 55.74 | AM | |||
| 4 | 6 | Pin Xiu Yip | 1:01.64 | |||
| 5 | 2 | Semicha Rizaoglou | 1:08.56 | |||
| 6 | 1 | Haideé Aceves | 1:09.99 | |||
| 7 | 7 | Annke Conradi | 1:10.38 | |||
| 8 | 8 | Vera Thamm | 1:17.04 |