Rooney has missed Manchester United's last two matches with an ankle problem.
But he was able to train earlier today with his team-mates.
Manchester United board plane ahead of Europa League clash with Anderlecht Wed, April 12, 2017
Manchester United are spotted boarding a plane ahead of their Europa League quarter-final tie against Anderlecht
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Manchester United players board a plane ahead of their clash with Anderlecht
Manchester United's Luke Shaw, Wayne Rooney and Michael Carrick
However the 31-year-old did not travel to Belgium and Mourinho revealed the striker is still struggling with the injury.
He said: "He is not happy with his condition. He's not confident.
"He has a bad feeling with his ankle. We'll have to see for the weekend."