Last year's FIFA Confederations Cup was blighted by demonstrations over the massive investment that has gone into the country's staging of the competition.
Further protests are still occurring in the South American nation, which will host the World Cup from June 12 to July 13, arguing in favour of increased social spending.
"I think protests can happen," Scolari told Brazilian TV show Fantastico. "If they are normal, without smashing things up, then that is democracy.
"But I don't know if it's the right time.
"They are Brazil players and they have one mission. They can think, they can express themselves, they can say 'I want a better Brazil, too', but I don't want it to be something that causes problems in our environment."
When asked if the unrest could have an impact on his players, Scolari replied: "It could, big time."
