The Brazil international returned to his homeland last weekend after being granted time off, having already been ruled out of the 3-1 victory over Lille through suspension.
Emery has confirmed that Neymar will also play no part against Strasbourg at the Stade de la Meinau on Wednesday evening, but would not reveal the full reasons behind the £198m world-record signing's ongoing absence.
"He called me on Saturday morning to tell me he had an important thing in his family and asked me if the club and I agreed to let him go to Brazil," he told reporters.
"It was important for him. The human element is important, sometimes the work goes into the background."
Neymar's long-term future at the Parc des Princes appears uncertain, with claims that a move to Real Madrid is on the cards at the end of next season.