In April Downie represented Great Britain at the European Championships in Cluj-Napoca, Romania, where she made history by qualifying for all five individual finals. The next day, she became the first British gymnast to win the all-around title at a major international competition, beating Hungary's Zsófia Kovács and France's Mélanie de Jesus dos Santos. She also won silver medals on vault and floor exercise, and won the bronze medal on the uneven bars. At the beginning of August she underwent surgery on her ankle due to an injury she had dealt with at both the British Championships and European Championships that year. Due to the surgery Downie was unable to competed at the 2017 World Championships.