The Red Devils stars, who all reached the semi-finals of the World Cup, will return three days earlier than scheduled to be ready for United's Premier League opener against Leicester City on August 10.
Mourinho spoke about the trio in his post-match press conference after a 2-1 win over Real Madrid, but made no mention of World Cup winner Paul Pogba, Jesse Lingard or Marouane Fellaini.
He said: "In a few days we go to Munich and in 11 days we start the Premier League and these are the players that we have, plus (Victor) Lindelof, that started training two days ago.
"Plus Marcus Rashford, (Phil) Jones and (Romelu) Lukaku because they gave to the group and to the team three days of their holiday so they're coming back three days early to try and be available for the team."
Alexis Sanchez scored a goal and provided an assist as United won their final International Champions Cup match at the Hard Rock Stadium, following a 4-1 defeat to Liverpool and a penalty shootout win over AC Milan.
Real Madrid got one back just before the break through Karim Benzema, who latched on to a probing cross by Theo Hernandez.
United - who gave a start to new signing Fred - only managed 29 percent of the possession and completed half the number of passes that Madrid managed.