[1] As part of the Canadian women's 4 × 400 metres relay team, she finished fourth at the 2022 and 2023 World Athletics Championships.

[2][3] Her 12 titles: In February 2020, alongside Guelph teammates Morgan Byng, Shyvonne Roxborough, and Tessa Hamilton, she set a Canadian record in the indoor 4 × 200 m relay, clocking a time of 1:36.10.

As part of Canada's mixed 4 × 400 m relay team, she won a silver medal with teammates Austin Cole, Aiyanna Stiverne, and Philip Osei.

The Canadian quartet of Natassha McDonald, Aiyanna Stiverne, Kyra Constantine, and Sherar took fourth in at time of 3:25.18.

The following year in the 4 × 400 metres relay at the 2023 World Championships in Budapest, Hungary, Sherar and the Canadian team finished fourth once again, clocking a time of 3:22.42 in the final.