She competed at the 2013 European Championships and together with Ganna Rizatdinova and Alina Maksymenko won Ukraine the Team silver medal.

At the World Club Championship, the 2013 Aeon Cup in Tokyo, Mazur competed with Rizatdinova and junior Eleonora Romanova and won the team silver representing the Deriugins School.

Mazur then competed at the 2014 Holon Grand Prix where she finished 6th in all-around, she qualified to 4 event finals and won bronze medal in hoop.

On 22–28 September Mazur, along with teammates Ganna Rizatdinova and Eleonora Romanova, represented Ukraine at the 2014 World Championships where they took the Team bronze with a total of 135.515 points.

Mazur with teammates (Ganna Rizatdinova, Eleonora Romanova) competed at the 2015 European Championships where Team Ukraine won bronze.

In August, Mazur then competed at the 2015 Ukrainian National Championships where she won the all-around silver medal behind Ganna Rizatdinova.

On 9–13 September Mazur, together with teammates Ganna Rizatdinova and Eleonora Romanova, competed at the 2015 World Championships in Stuttgart, with Team Ukraine taking bronze.

In 2016 Season, Mazur started her competitions at the 2016 Valentine Cup in Tartu, Estonia where she won silver in hoop, ball and bronze in ribbon.

In 2017, Mazur started the post-Olympics season competing at the Miss Valentine Cup, where she won the all-around gold with a total of 64.750 points.

[15] On 24–26 March Mazur competed at the Thiais Grand Prix finishing 6th in the all-around, she qualified to 3 event finals taking silver in ball, placed 5th in hoop and 8th in clubs.

On 19–21 May Mazur along with teammates Olena Diachenko and Yeva Meleschchuk represented the individual seniors for Ukraine at the 2017 European Championships, she qualified in 2 apparatus finals.

Mazur competed at the quadrennial held 2017 World Games in Wrocław, Poland from 20–30 July, qualifying in 3 apparatus finals but did not medal.