[8] She competed at the 2015 Elite Gym Massilia in Marseille, France, where she finished thirteenth in the all-around with a score of 54.200.

[10] She was selected to compete at the Olympic Test Event alongside Diana Bulimar, Anamaria Ocolișan, Cătălina Ponor, Dora Vulcan, and Silvia Zarzu.

In the qualifying round, she competed on three events and scored a 13.333 on the uneven bars, a 13.700 on the balance beam, and a 13.633 on the floor exercise.

[16] Her final competition of the season was the Gymnasiade in Trabzon, Turkey, and she won the silver medal on the floor exercise with a score of 13.733.

[20] Her final competition of the year was the World Cup in Szombathely where she finished fourth on balance beam.

[5] She competed at the World Championships with Ioana Crișan, Carmen Ghiciuc, and Denisa Golgotă where they finished twenty-second in the qualification round.

[29] Although Holbură was initially named to Romania's team for the European Championships,[30] she was later removed in favor of Daniela Trică.

However, when Silviana Sfiringu and Ioana Stănciulescu both withdrew due to injuries, they were replaced by Maria Ceplinschi, and Holbură was not added to the team because she was "insufficiently prepared".

[32] After the European Championships, Holbură switched coaches to train with Lăcrămioara Filip and Cristian Moldovan alongside Larisa Iordache in Bucharest as they both prepared for the Olympic Games.

[34] At the Olympic Games, Holbură finished sixty-fifth in the all-around during the qualification round with a total score of 49.166.