https://www.bbc.com/news/world-us-canada-54007103
"I take responsibility for trusting the word of a neighbourhood salon," the top Democrat told reporters on Wednesday. "It turns out it was a setup."
Mrs Pelosi was pictured in the salon without a mask over her face.
The California lawmaker has often criticised President Donald Trump for refusing to wear a mask.
"I take responsibility for trusting the word of a neighbourhood salon that I've been to over the years many times," Mrs Pelosi said in a testy press conference in San Francisco when asked about the incident.
She said eSalon SF had told her they could accommodate one guest at a time.
"I trusted that - as it turns out it was a setup," Mrs Pelosi said. "So I take responsibility for falling for a setup and that's all I'm going to say on that.