Coach Dunga said he wanted Ronaldinho and Kaka at the Copa America in Venezuela this summer but respected their decision to ask for a rest.
Ronaldinho accepted criticism about his play this season. saying he hoped to be in better shape for next season.
"I can give a lot more," he said. "I have scored more goals this year, but I haven't had the consistency in my play of previous years."
Ronaldinho will have two more games with Barca in La Liga after the friendlies.
Dunga's 22-man squad for the European tour included uncapped Afonso Alves, top scorer in the Dutch league with 34 goals for Heerenveen but largely an unknown back in Brazil.
Goalkeepers: Doni (AS Roma), Helton (Porto);
Defenders: Alex (PSV), Daniel Alves (Sevilla), Gilberto (Hertha Berlin), Juan (Bayer Leverkusen), Maicon (Inter Milan), Marcelo (Real Madrid), Naldo (Werder Bremen), Alex Silva (Sao Paulo);
Midfielders: Diego (Werder Bremen), Edmilson (Barcelona), Kaka (AC Milan), Elano (Shakhtar Donetsk), Gilberto Silva (Arsenal), Josue (Sao Paulo), Mineiro (Hertha Berlin);
Forwards: Afonso Alves (Heerenveen), Jo (CSKA Moscow), Robinho (Real Madrid), Ronaldinho (Barcelona), Vagner Love (CSKA Moscow).