As prime minister, Marin was in charge of the response to the COVID-19 pandemic. She called out the human rights abuses of Uyghurs in Xinjiang and the 2022 Russian invasion of Ukraine. With President Sauli Niinistö, she announced that Finland would apply for NATO membership in May 2022. She was also criticized, mainly because of a October 2020 photoshoot and leaked private party videos. In 2022, she was called by an "the icon of progressive leadership" by the Australian Broadcasting Corporation. The SDP finished third in the 2023 parliamentary election, ending Marin's time as prime minister in June 2023. Three months later, she retired from politics.