Diving at the 2020 Summer Olympics – Men's 3 metre springboard

The men's 3 metre springboard diving competition at the 2020 Summer Olympics in Tokyo was held in 2021 at the Tokyo Aquatics Centre. It was the 26th appearance of the event, which has been held at every Olympic Games since the 1908 Summer Olympics.

Competition format
The competition was held in three rounds:
 * Preliminary round: All divers perform six dives; the top 18 divers advance to the semi-final.
 * Semi-final: The scores of the preliminary round are erased. The 18 remaining divers perform six dives each, and the top 12 divers advance to the final.
 * Final: The semi-final scores are erased. The 12 final divers perform six dives each, and the top three divers win the gold, silver and bronze medals respectively.

Within each round of six dives, at least one dive must be from each of the five groups (forward, back, reverse, inward, and twisting). The sixth dive may be from any group, but may not repeat one of the other dives. Each dive is assigned a degree of difficulty based on somersaults, position, twists, approach, and entry. There is no limit to the degree of difficulty of dives; the most difficult dives calculated in the FINA rulebook (reverse 4 $1/2$ somersault in pike position and back 4 $1/2$ somersault in pike position) are 4.7, but competitors could attempt more difficult dives. Scoring is done by a panel of seven judges. For each dive, each judge gives a score between 0 and 10 with 0.5 point increments. The top two and bottom two scores are discarded. The remaining three scores are summed and multiplied by the degree of difficulty to give a dive score. The six dive scores are summed to give the score for the round.

Schedule
All times are Japan standard time (UTC+9)

Qualification
The top 12 divers at the 2019 World Aquatics Championships earned a quota spot for their NOC. The top 1 diver at each of the 5 continental championships earned a spot (excluding divers who earned a spot at the World Championships and divers from NOCs that had already earned two spots). Additional quota places go to the next best finishers in the 2020 FINA World Cup (with the same limitations) until the maximum number of divers is reached. Divers must be at least 14 years old by the end of 2020 to compete.