Both Mr. Yang and Ms. Garcia’s campaigns have denied that Ms. Wiley was invited to Saturday’s events.
Ms Wiley declined to criticize Ms Garcia and Mr Yang’s joint appearance, although she appeared to rule out the possibility of doing something similar.
“The candidates are going to run,” she said on Saturday. “I’ll talk to people.
Ms Wiley also received endorsement on Saturday from Alessandra Biaggi, a prominent state senator, another sign of momentum for Ms Wiley among progressive leaders. Ms Biaggi had supported Scott M. Stringer, the city comptroller, but withdrew her support after being accused of sexual misconduct.
Mr Sharpton suggested that Mr Adams’ strategy appeared to be centered on attracting as many black and Latino voters as possible to places like the Bronx, central Harlem and central Brooklyn, and making forays into moderate white voters. Public polls suggest Mr. Adams has a clear advantage over black voters, but Mr. Yang and Ms. Garcia are also competing for moderate Latino and white voters.
“He will get moderate white voters because of his criminal stance,” Sharpton said of Mr. Adams. “With this increase in violence, it is he who has taken the final position on public safety.”
The Yang-Garcia event cost Ms Garcia a choice vote from Jumaane Williams, the town’s public counsel. Mr Williams had endorsed Ms Wiley as his top pick and announced his secondary picks on Saturday, which included Mr Adams.
Ms Garcia’s alliance with Mr Yang, he said, was enough to exclude him from his poll. “As I said before, while I have concerns about several candidates, at this point I am particularly concerned about Andrew Yang for mayor,” he said.
Mr. Adams, for his part, seemed to be enjoying himself in the countryside. At Orchard Beach in the Bronx, he appeared in a swimsuit, smiling and waving at beach goers calling greetings from the sand. Then Mr. Adams waded through the water.
Reporting was produced by Anne Barnard, Katie Glueck and Michael Gold.