In January 2021, she won one of the bronze medals in her event at the 2021 Judo World Masters held in Doha, Qatar. A few months later, she won one of the bronze medals in the women's 63 kg event at the 2021 European Judo Championships held in Lisbon, Portugal. She was not selected as one of the judoka to represent the Netherlands at the 2020 Summer Olympics in Tokyo, Japan which turned her year's focus to the 2021 World Judo Championships in Budapest, Hungary. She reached the semi-finals in the women's 63 kg event where she lost against the eventual gold medalist Clarisse Agbegnenou of France. Vermeer then secured the bronze medal by defeating Ketleyn Quadros of Brazil.