Ten Hag hopes Rashford and Man Utd 'find each other' in contract talks
Rashford has enjoyed the best season of his career with 29 goals in all competitions for United, including 16 in the Premier League.
However, the United academy graduate has yet to put pen to paper on a new deal and although Ten Hag said he knew why talks have dragged on, the Dutchman refused to elaborate.
"Yes, I know (why), but I don't talk about the process. Let the process go. Once again, this is not important at the moment for me or Rashy," Ten Hag told reporters ahead of Saturday's league match at Bournemouth.
"For him, it is to get more goals this season. He is playing a wonderful season and the team is playing a wonderful season. We have to get into the Champions League and focus on that.
"Marcus wants to stay and we want him to stay, so I think we will find each other."
United are fourth in the table with 66 points and have a game in hand over Liverpool, who are a point behind in the top-four race for Champions League qualification.
Ten Hag's side are also in the FA Cup final where they will look to deny their rivals Manchester City a shot at the treble achieved only once before in England - by the 1998-99 United team - but he is not looking that far ahead yet.
"When we have three games and it's gone, yes, I will enjoy it. Before that, it is not important at all," he said.
"I think we have to keep doing what we have all season, improve every day and improve every game ... Focusing on the next game is the most important."
(Reporting by Rohith Nair in Bengaluru; Editing by Jacqueline Wong)