“After the Sunderland game there were a lot of conversations between his representatives and ours, between him and me,” Slot said.
Salah is set to depart for the Africa Cup of Nations on Monday and depending on how far Egypt go in the competition, might not return to Merseyside until after the final on 18 January.
He has scored five goals in 18 appearances in the Premier League and Champions League this season.
Speaking at a news conference on Monday, Slot said he had “no clue” if Salah had played his final game for the club but added he is a “firm believer” in the possibility of a player returning to the fold.
Salah was heavily linked with a move to Saudi Arabia last summer and that interest remains, with Saudi Pro League chief executive Omar Mugharbel saying he is a target for clubs.
During Friday’s news conference, Slot was constantly probed about his relationship with Salah and his freedom to make decisions with regard to team selection.
“We decided as a club – and I was part of that decision – not to take him to Milan,” said Slot.
“I am always in contact with them [sporting director Richard Hughes and chief executive Michael Edwards] but when it comes to the decision making of the line-up or the squad, they leave that open to me.”