The 34-year-old was ready for PSG earlier this week, but has recently returned from holiday after the Copa América triumph with Argentina and is not ready for games yet.
Neymar is not selected in the squad either.
Brass met Lionel Messi and Argentina in the Copa América final last month.
In addition, Sergio Ramos, Gianluigi Donnarumma, Idrissa Gueye, Leandro Paredes, Juan Bernat, Colin Dagba and Ángel Di María are also missing.
PSG started the season with a win away against Troyes (2-1) last weekend.
Today, Saturday, they play their home premiere against Strasbourg at 21.00.