Stuttgart World Championships: On September 9–13, Zeng competed in her first World Championships in Stuttgart and ranked 11th in qualifications. Zeng qualified to 1 apparatus final finishing 7th in Clubs ahead of Korean Son Yeon-Jae. In the all-around finals; Zeng finished 8th with a total of 70.416 points, the highest finish for an American rhythmic gymnast, bettering the 10th place from Mary Sanders in the 2003 World Championships. As a result, Zeng qualifies the United States an individual spot in 2016 Rio Olympic Games.