Messi will be sidelined for the next three weeks due to a groin strain suffered in Barca's 1-1 draw with Atletico Madrid on Wednesday night. And that brought a furious rebuke of the Catalans from Bauza.
"They send us messages to look after Messi but they don't protect him. He plays every match," Bauza, who said his team would nevertheless cope, told Fox Sports.
"We've already played without Messi. Having him is an advantage for the problems he creates (for opponents). But for me as coach and for the team it's a challenge if we have to play without him."
Argentina are third in the South American World Cup qualifying group, one point behind leaders Uruguay. They play Peru in Lima on October 6 before hosting Paraguay on October 11 in Cordoba.
Only the top four teams in CONMEBOL qualifying earn an automatic place at the 2018 World Cup in Russia.