[10][11][12] At the 2015 Pan American Games she was 5th in the All-Around, 7th with hoop, 6th with clubs, 5 with ribbon and won bronze with ball.

[19] At the Pan American Championships she was 5th in the All-Around, 6th with hoop, 6th with ball, won bronze with clubs and ribbon and silver in teams.

[23] At her fourth World Championships in Sofia she ended 50th in the All-Around, 67th with hoop, 46th with ball, 35th with clubs and 18th in teams.

[33] Diaz was again selected for the World Championships, ending 55th in the All-Around, 44th with hoop, 32nd with ball, 119th with clubs, 66th with ribbon and 25th in teams.

[36] At the Pan American Championships she won bronze with clubs, silver in teams and gold with hoop.

[42][43] Karla won team gold and hoop silver at the Central American and Caribbean Games.