Sanna Marin was out partying after her adviser tested positive for COVID-19, according to local reports.
Marin was at the Butchers nightclub in the country's capital, Helsinki, on Saturday, according to Sieska magazine.
The Iltalehti news outlet reported that she was made aware that she was exposed to COVID-19 after her foreign minister tested positive for the virus.
Marin told the outlet that there would be no special measures taken because she was fully vaccine free.
Marin missed a text message on her work phone that said she should avoid social interactions, according to the newspaper.
Marin took a COVID-19 test after seeing the message and it came back negative.
The Prime Minister's Office told government officials to avoid contact with others after they received notice of an exposure, according to a report.
Marin apologized for not isolating, but she said she didn't question the initial information she was given because it was consistent with what her citizens had been told.
I should have used better judgement on Saturday night. She apologized and said she was really sorry.
