| Date | 30 July 2021 — 15:00 |
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| Location | Olympic Aquatics Centre, 2-1, 2chome, Tatsumi, Koto-ku, Tatsumi-no-Mori Seaside Park, Tokyo, Japan |
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| Format | Five dives. Top 18 advanced to the semi-finals. |
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| Referee | Ildikó Kelemen |  HUN |
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| Assistant Referee | Akito Suehiro |  JPN |
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| Judge 1 (rounds 1-3) | Rao Lang |  CHN |
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| Judge 2 (rounds 1-3) | Julie Ahlering |  USA |
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| Judge 3 (rounds 1-3) | Sergio Rocha |  MEX |
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| Judge 4 (rounds 1-3) | Lindsey Fraser |  GBR |
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| Judge 5 (rounds 1-3) | Gillian Brooker |  AUS |
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| Judge 6 (rounds 1-3) | William Lee |  SGP |
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| Judge 7 (rounds 1-3) | Holger Schlepps |  GER |
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| Alternate Judge (rounds 1-3) | Florin Avasiloae |  ROU |
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| Judge 1 (rounds 4-5) | Masako Asada | JPN |
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| Judge 2 (rounds 4-5) | Marco Zampieri |  ITA |
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| Judge 3 (rounds 4-5) | Gord Peterson |  CAN |
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| Judge 4 (rounds 4-5) | Anatoliy Holovan |  UKR |
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| Judge 5 (rounds 4-5) | Mohamed Hassan |  EGY |
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| Judge 6 (rounds 4-5) | Angelique Rodríguez |  PUR |
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| Judge 7 (rounds 4-5) | Min Suck-Hong |  KOR |
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| Alternate Judge (rounds 4-5) | Eduard Feoktistov |  RUS |
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MAS
SUI
SWE
ROC
NED
BRA
RSA