Bale spent last season on loan at Tottenham, where he played under Mourinho until the Portuguese manager was relieved of his duties in early May.
And when previewing each country chances for the tournament – for The Sun – Mourinho has taken his latest swipe at Bale.
“When we look to Gareth and how many great performances he had, how many goals he scored against the best teams, there were not many or none.
“It’s not an easy situation for a country without many options.”
Bale found the net 11 times last season, however, five of those came in the final weeks of the season – including a hat-trick against an already relegated Sheffield United.
Do you think Bale will retire? Let us know in the comments section
Bale is currently with the Welsh national squad, as they prepare for their opener against Switzerland on June 12.
However, with a year left on his Madrid contract, retirement rumours are rife following his cryptic response to an interview at Wales’ camp.