Powerful Spain will play an opening-round Davis Cup tie against Canada next week without its' top-two players, Rafael and David Ferrer.
World No. 11 Nicolas Almagro will lead the Spaniards against the Canadians in Vancouver from Feb. 1-3.
Spanish captain Alex Corretja has also called on a doubles team of Marcel Granollers and Marc Lopez, while 51st-ranked Albert Ramos is also on the squad.
Nadal hasn't played since June because of a left knee injury.
Five-time champion Spain lost to the Czech Republic in last year's Davis Cup final.
Canada, which has never won the Davis Cup, will be led by world No. 15 star Milos Raonic, and the team will also include Vasek Pospisil, Frank Dancevic and Daniel Nestor.