01/10/2013 01:52 EST

Three Days Grace Singer Adam Gontier Quits Band Over Health Issue


Canadian rock band Three Days Grace is moving forward after announcing yesterday singer Adam Gontier — who was with the band for two decades — had left the group. The band announced yesterday morning that My Darkest Days singer Matt Walst (and brother of Three Days Grace member Brad Walst) would be joining the band temporarily for their North American tour kicking off on Feb. 1 with Shinedown.

"Former lead singer, Adam Gontier, has left the group effective immediately due to a health issue," the band said in the statement, adding they were "surprised and distressed" by Gontier's "sudden departure." A subsequent post yesterday fleshed out more details, stating the band found out Dec. 21 that "Adam wished to resign from the band" because of a "non life threatening health issue and wanted the band to continue moving forward with him."

The subsequent speculation about Gontier's condition led the former Three Days Grace singer to post a statement on Facebook stating that the health issue was not a relapse into drugs.

"It is important for me to address any concerns regarding my health being connected to drugs or addiction," Gontier wrote. "The truth is, when I was struggling during that dark time in my life, I hit rock bottom, and I had the kindest of people reach out from all over the world, and reach their hands out to pick me up. I am so blessed to be walking in the light now. I am reminded of your loyalty, always. The truth is, and I'm very proud to say this..., I am sober. That chapter in my life is over."

Gontier went into rehab in 2005 in Toronto after admitting an addiction to Oxycontin. The rehab stint influenced some material which would appear on the band's One-X album including songs "Pain" and "Over And Over."

The group — which formed in 1992 under the name Groundswell — released its last studio album Transit Of Venus in October.