Sum 41 have canceled their Vans Warped tour as their lead singer, Deryck Whibley, Avril Lavigne’s ex-husband, recovers from an attack at a Japanese bar that took last week.
The group said in a statement released on Wednesday: "Knowing that they are unable to deliver their signature high energy show, Sum 41 made the tough decision that a break is needed while Deryck begins rehabilitation for the slipped disc."
30-year-old Whibley was assaulted by three men after playing the Summer Sonic rock festival in Japan last week, according to reports.
The attack led to an injury on Whibley, which has aggravated a prior disc injury from 2007. "He is expected to make a full recovery with the necessary treatment and rest," the band continued in a statement.
The band will pick up their European tour at the end of August, the band said.
Whibley split from Avril Lavigne in September 2009 after three years of marriage.