The six Premier League clubs who refused to release players for Brazil's World Cup qualifiers "need to be told" if they are suspended this weekend.
European Clubs' Association chief executive Charlie Marshall said clubs need to know in the next 24 hours "if they can play their Brazilians or not".
Fifa can ban players not released in an international window for a period of five days after the window ends.
Nine Premier League players were selected for Brazil's three games.
The players called up were Liverpool trio Alisson, Fabinho, and Roberto Firmino, Manchester City's Ederson and Gabriel Jesus, Chelsea defender Thiago Silva, Manchester United's Fred, Leeds forward Raphinha, and Everton striker Richarlison.