The Swiss camp will be held Dec. 16-18 in Lenzerheide, Switzerland. The Swiss also will play a pair of pre-tournament games in Sweden, against the Czech Republic on Dec. 21 and Canada on Dec. 23.
The 2014 WJC runs from Dec. 26 to Jan. 5, 2014, in Malmo, Sweden. Switzerland will be in Group B with Sweden, Russia, Finland and Norway.
Mueller, taken No. 18 by the Sharks, has two goals and six assists in 28 games with the Everett Silvertips of the Western Hockey League. He had two assists and a plus-7 rating in six games at the 2013 WJC for Switzerland, which finished sixth.