Schumacher remains in a critical but stable condition in an induced coma in a Grenoble hospital having suffered severe head injuries in a skiing accident last Sunday.
His manager Sabine Kehm issued a statement on Saturday morning underlining that information regarding Schumacher's health would only be issued via the hospital or herself, following reports that attributed comments to ex-F1 driver Philippe Streiff.
"Michael's condition remains critical but stable," said Kehm's statement.
"We would like to clearly stress that any information regarding Michael's health not coming from the doctors treating him or from his management must be treated as invalid and pure speculation.
"In consultation with the doctors treating Michael, it is not expected there there will be any press conference before Monday."
Kehm also addressed reports that police were examining footage from a helmet camera worn by Schumacher during the skiing trip on which the accident happened.
"Michael's helmet camera was voluntarily given to the investigating authorities by the family," she said.
"That this should have been done against the wishes of the family is untrue.
"We ask you to respect the continued privacy of the family."
On Friday evening Robert Kubica, who suffered life-threatening injuries of his own in his February 2011 rally crash, expressed his concern about press intrusion affecting Schumacher's family.
"I was in a similar situation and I know media can play quite a hard game in a very difficult period for him, his family and close friends," said Kubica.
"I wish him all the best and definitely keep fingers crossed he will recover and everything will be fine."