Zaretska won one of the bronze medals in the women's kumite 68 kg event at the 2014 World Karate Championships held in Bremen, Germany.

At the 2018 European Karate Championships held in Novi Sad, Serbia, Zaretska won the silver medal in the women's kumite 68 kg event.

[2] In November 2021, she won the gold medal in the women's 68 kg event at the World Karate Championships held in Dubai, United Arab Emirates.

[15] She lost her bronze medal match in the women's 68 kg event at the 2022 World Games held in Birmingham, United States.

[17][18] Zaretska won the silver medal in the women's 68 kg event at the 2023 European Karate Championships held in Guadalajara, Spain.