Country duo Thompson Square have cancelled three more shows as singer Keifer Thompson continues to struggle with health issues.

The husband and wife group axed a handful of concerts last month (May13) to allow Thompson time to recover from a "very serious vocal condition", but his condition has yet to improve and now the singers have been forced to pull the plug on a trio of upcoming gigs, beginning with a show in Illinois on Thursday (13Jun13).

Thompson hopes to be back on the road soon - in a post on Twitter.com on Wednesday (12Jun13), he wrote, "update... I can talk now. just started therapy. not quite ready to sing yet."