Singer Shawn Mendes has postponed the first leg of his Wonder: The World Tour indefinitely. He shared the reason behind the delay was his mental health.

In a statement, posted on his social media handles, Mendes said his decision to return to touring was proving difficult to manage and taking a toll on his health.

“This breaks my heart to have to say this, but unfortunately I’m going to have to postpone the next three weeks of shows through Uncasville, CT until further notice,” Mendes wrote.

“I’ve been touring since I was 15 and to be honest it’s always been difficult to be on the road away from friends and family. After a few years off the road, I felt like I was ready to dive back in, but that decision was premature and unfortunately the toll of the road and the pressure has caught up to me and I’ve hit a breaking point,” he added.

The 23-year-old singer, known for hit tracks like Treat You Better and There’s Nothing Holdin’ Me Back, said he consulted with his team and health professionals, who advised him to take care of his mental health.

“I need to take some time to heal and take care of myself and my mental health, first and foremost. As soon as there are more updates I promise I will let you know,” he concluded in his heartfelt message.

Mendes, whose break-up with singer Camila Cabello left their fandom heartbroken, started the tour on July 7 in Winnipeg. The second performance, which was cancelled, of Wonder: The World Tour was supposed to have taken place on July 9 in St. Paul, Minnesota. The tour would have seen performances by Mendes in Washington D.C., Philadelphia, St. Louis and Cleveland.

On the tour’s website, all the shows in the United States till July 29 stand postponed. The dates from July 31 remain unchanged, with Mendes possibly resuming the tour from Toronto.