John “Jack” Karthaus, 85, of Austin, Minnesota, died Monday, Oct. 10, 2016, at Mayo Clinic Health System-Austin. A Funeral Mass will be celebrated noon on Friday, Oct. 14, 2016, at St. Augustine Catholic Church with Father Jim Steffes officiating. Friends may call one hour before the service at the church on Friday. Interment will be in Calvary Cemetery. Condolences may be left online at www.mayerfh.com