The Armenian is out of favour at Old Trafford and it is reported that he maybe sold when the transfer window opens.
Inter are very keen on the former Borussia Dortmund star and would love to sign him on loan for the rest of the season.
However, according to Gazzetta dello Sport, Inter cannot confirm to Manchester United that they will buy Mkhitaryan outright in the summer.
The Italian club are reportedly handicapped by UEFA's Financial Fair Play regulations and it means they cannot splash the cash in January or at the end of the season.
Inter's failure to guarantee a permanent switch for Mkhitaryan could hinder their hopes of signing him and allow the likes of Borussia Dortmund to swoop in.