The band's founding guitarist announced in January that he'd be taking a break from Fall Out Boy to work on his mental health.
"I was like, ‘Oh. You have to figure out how to be happy as an adult,'" Wentz said of the turning point in his life.
The LP, due March 24, holds a total of 13 tracks.
"Without divulging all the details, I must disclose that my mental health has rapidly deteriorated over the past several years," Trohman wrote in a note.
Listen to the Grammy-nominated singer/songwriter's latest musical contribution to the Disney Junior show.