"Henrikh is still undergoing late stage rehabilitation from the left thigh muscle injury that he sustained earlier this month whilst playing for Manchester United," Steve McNally, United's head of medicine, said in a statement to the FFA (www.ffa.am).
"In view of that I would be grateful if he could be allowed to withdraw from the National Team for the forthcoming training camp and FIFA World Cup Qualifying matches in order to remain in Manchester to complete his rehabilitation."
Armenia are at the bottom of their World Cup qualifying group after losing to Denmark last month.
(Reporting by Shravanth Vijayakumar in Bengaluru, editing by Ed Osmond)
