The star, who also performs under the stage name JDevil, had been due to play alongside the rockers on their Twins Of Evil trek, which kicks off on Friday (28Sep12) - but he has scrapped the shows on medical advice.
A post on the star's Facebook.com page reads, "Hey guys - we wanted to let you know right away that JDevil will no longer be able to join Rob Zombie and Marilyn Manson on their co-headlining Twins Of Evil Tour...
"Due to exhaustion from his recent eight-week overseas tour with Korn, Jonathan's doctors have ordered him to refrain from any travel and performing for the next few weeks while he recuperates.
"We got this from management: 'Jonathan is really bummed right now and regrets having to disappoint anyone, especially his fans and his good friends Marilyn Manson and Rob.' We'll keep you updated here, everyone expects he'll be back on track soon."
In a message to fans on Twitter.com, Davis wrote, "I'm sorry guys. My head and my body are really f**ked up. Back on meds trying to get better. Dr. said no way I could perform. F**k! I'm sorry. I really love you guys. I'm so depressed."