The Women's 50 metre breaststroke swimming events for the 2020 Summer Paralympics took place at the Tokyo Aquatics Centre on 31 August 2021.

SB3 The SB3 category is for swimmers who have function in their hands and arms but are unable to use their trunk or legs to swim, or they have three amputated limbs.

Heats The swimmers with the top eight times, regardless of heat, advanced to the final.

Rank Heat Lane Name Nationality Time Notes 1 1 5 Marta Fernández Infante 59.46 2 2 7 Nely Miranda 1:02.61 3 2 5 Patrícia Pereira 1:03.37 4 2 4 Leanne Smith 1:03.49 5 1 1 Nataliia Butkova 1:03.56 6 2 3 Patricia Valle 1:05.03 7 1 4 Maryna Verbova 1:05.10 8 1 3 Olga Sviderska 1:05.84 9 2 2 Zoya Shuchurova 1:07.57 10 2 6 Ellie Challis 1:10.37 PR 11 1 6 Dominika Mičková 1:13.46 12 1 7 Gina Böttcher 1:17.41 13 1 2 Tammy Cunnington 1:17.94 14 2 1 Veronika Guirenko 1:22.17

Final Rank Lane Name Nationality Time Notes 4 Marta Fernández Infante 58.21 2 Nataliia Butkova 1:00.54 5 Nely Miranda 1:01.60 4 3 Patrícia Pereira 1:01.82 5 6 Leanne Smith 1:02.95 6 1 Maryna Verbova 1:03.09 7 7 Patricia Valle 1:04.34 8 8 Olga Sviderska 1:04.75

References