Daniel Ballard has returned to Sunderland after picking up a hamstring injury on international duty, ruling him out for the remainder of Northern Ireland's current fixture window, according to BBC News.
Manager Michael O'Neill confirmed the defender would take no further part in this camp but expressed optimism over a swift recovery, saying he "hopefully" expects Ballard to be available again when Northern Ireland reconvene for their November fixtures.
No further details on the severity of the injury or a specific return timeline have been provided.