Simone Biles, the superstar American gymnast, will not compete in Sunday’s event finals for vault and uneven bars at the Tokyo Games, according to U.S.A. Gymnastics. She withdrew from the event finals and the all-around final earlier this week, citing mental health reasons, and is still eligible for finals in the floor exercise on Monday and the balance beam on Tuesday.

MyKayla Skinner, the American who had the fourth-highest score on vault during qualifying, will take Biles’s place in the vault final. Skinner did not initially secure a spot in the final because every country is allowed only two gymnasts in each final, and Biles and Jade Carey had qualified ahead of her.

Mélanie de Jesus dos Santos of France will take Biles’s place in the bars finals.

In an emailed statement on Saturday, U.S.A. Gymnastics said Biles “will continue to be evaluated daily” to determine whether she will compete in the floor exercise and the balance beam or whether her Tokyo Games are over.

“We remain in awe of Simone, who continues to handle this situation with courage and grace, and all of the athletes who have stepped up during these unexpected circumstances,” the statement said.

Biles, the four-time Olympic gold medalist, won a silver medal with her U.S. team in the team final after backing out of the event once it had begun. After performing the vault during finals, she said she had gotten lost in the air and could no longer gauge where her body was in relation to the ground. Two days later, she also did not compete in the all-around final because of the issue, which she said on Friday was still plaguing her. She had been expected to win that event and become the first woman in 53 years to win back-to-back all-around Olympic titles.

Sunisa Lee, of St. Paul., Minn., went on to win the all-around on Thursday, and Lee will compete for her next medal on Sunday on the uneven bars, her specialty.