The former Ajax and Hamburg star has struggled to get first-team action at Real this season.
Van der Vaart has previously been warned by Dutch coach Bert van Marwijk that he needs first-team action to stay in the Holland squad.
Provisional Holland squad in full:
Goalkeepers: Maarten Stekelenburg (Ajax), Michel Vorm (Utrecht), Piet Velthuizen (Vitesse Arnhem)
Defenders: Edson Braafheid (Bayern Munich), Giovanni van Bronckhorst (Feyenoord), John Heitinga (Everton), Glenn Loovens (Celtic), Joris Mathijsen (Hamburg), Andre Ooijer (PSV Eindhoven), Gregory van der Wiel (Ajax)
Midfielders: Ibrahim Afellay (PSV Eindhoven), Orlando Engelaar (PSV Eindhoven), Nigel de Jong (Manchester City), David Mendes da Silva (AZ Alkmaar), Stijn Schaars (AZ Alkmaar), Wesley Sneijder (Inter Milan), Demy de Zeeuw (Ajax)
Forwards: Ryan Babel (Liverpool), Eljero Elia (Hamburg), Klaas Jan Huntelaar (AC Milan), Dirk Kuyt (Liverpool), Robin van Persie (Arsenal), Arjen Robben (Bayern Munich)
