Original Three Days Grace vocalist Adam Gontier left the band abruptly in late 2012. The band was notified via Adam's lawyer that he had resigned due to a health issue, but later stated some comments leading fans to believe he just didn't want to be in the band anymore. I'm not sure of any internal band issues but that aside, those were his bandmates of almost ten years. It's also their job that they have to rely on income.

 

Luckily they were able to continue with Matt Walst of My Darkest Days, on vocals. Matt has been indirectly part of the Three Days family for a long time as a writing partner, occasional touring member and brother of bassist Brad Walst.