The 32-year-old featured at the Confederations Cup in Russia, though he left the tournament before Portugal’s third-place play-off match to be with his newborn twins and he has now been left out of Real Madrid’s 26-man squad for the USA tour
Zinedine Zidane’s Madrid – who open their ICC campaign against Manchester United on July 23 – still includes a host of stars, including Gareth Bale, Karim Benzema, Toni Kroos, Luka Modric, Isco, Marcelo and new signing Theo Hernandez.
Alvaro Morata is also in the travelling party, despite widespread speculation of an imminent departure from the Spanish and European champions.
While Madrid will be without Ronaldo, fellow ICC participants Barca can call upon Lionel Messi, Luis Suarez and Neymar.
Messi, who finally signed a contract extension after marrying his long-term partner Antonella Roccuzzo in Rosario, headlines Ernesto Valverde’s first Barca squad.
Valverde replaced Luis Enrique at the end of 2016-17 and his Barca team also features Javier Mascherano, Andres Iniesta, Gerard Pique, Ivan Rakitic and Arda Turan.
However, first-choice goalkeeper Marc-Andre ter Stegen is not involved after helping Germany win the Confederations Cup.
Barca face 2016-17 Champions League runners-up Juventus in New Jersey on July 22.