Last March, Roma advised Abdullahi to quit football for 30 days after undergoing some cardiological tests at the club.
The 21-year-old has not played a competitive game since February 2018 when he turned out for Perugia in Serie B.
Abdullahi initially joined Roma on loan from Spezia in June 2015 before the Stadio Olimpico outfit made his deal permanent a year later.
Despite his fine displays in the youth team, the 21-year-old was unable to break into the first-team set-up and was sent out on an 18-month loan to Perugia last January where he managed 53 minutes of football from three games.
In 2017, the Nigeria defender penned a four-year contract extension that will keep him in the Italian capital until the summer of 2021.
Because of his inability to attain match fitness level, La Gazzetta dello Sport claims that the Giallorossi are considering a coaching role for the Kaduna-born full back who has been at the club since 2015.