Coach Fernando Santos also included midfielder Andre Gomes despite his troubles at Barcelona.
The Portuguese Football Federation says Santos will announce his final 23-man squad on Thursday.
Portugal faces Spain in one of the biggest group match clashes on June 15. Morocco and Iran are also in their group.
Goalkeepers: Anthony Lopes (Lyon), Beteo (Goztepe), Rui Patricio (Sporting Lisbon).
Defenders: Antunes (Getafe), Bruno Alves (Rangers), Cedric Soares (Southampton), Joao Cancelo (Inter Milan), Jose Fonte (Dalian Yifang), Luis Neto (Fenerbahce), Mario Rui (Naples), Nelson Semedo (Barcelona), Pepe (Besiktas), Raphael Guerreiro (Borussia Dortmund), Ricardo Pereira (FC Porto), Rolando (Marseille), Ruben Dias (Benfica).
Midfielders: Adrien Silva (Leicester), Andre Gomes (Barcelona), Bruno Fernandes (Sporting Lisbon), Joao Mario (West Ham), Joao Moutinho (Monaco), Manuel Fernandes (Lokomotiv), Ruben Neves (Wolverhampton), Sergio Oliveira (FC Porto), William Carvalho (Sporting Lisbon).