The midfielder has returned to Manchester and will be assessed by the Club’s medical staff.
The 27-year-old had earned his first international call-up since November 2015, ahead of the Three Lions’ World Cup qualifiers against Slovenia and Lithuania.
Delph’s impressive performances have been a major talking point of City’s recent form.
He has featured in five of the Blues’ last six games, completing 90 minutes in three and scoring a stunning goal against Crystal Palace.
He played the full 90 minutes of City’s 1-0 victory over Chelsea on Saturday.
ManCity.com will bring you all the latest on Fabian as we receive more news.