Clark Robertson has been withdrawn from Scotland Under-21 duty after suffering a knee injury in training with Aberdeen.
The young left back picked up the knock on Thursday morning, ruling him out of the Dons’ weekend match with Inverness and Scotland’s game with Italy next midweek.
Robertson, 18, has stepped into Craig Brown's side to cover for the loss in January of Richard Foster and has made 12 appearances to date.
His call-up to Billy Stark's national selection represented his first involvement at Under-21 level, alongside six other uncapped players.
"Clark has sustained quite a severe looking knee injury," Aberdeen boss Brown told RedTV. "We will have to wait for a day or two until the medical staff have had a chance to assess it properly but it was very painful for Clark this morning in training.
"It's a major disappointment for the lad because he has been playing well and had been called up to the Scotland Under-21 squad to play against Italy next week.
"I had to phone Billy Stark and break the sad news to him and Billy indicated that he was to make his Under-21 debut against Italy.
"Knees and ankles are very, very awkward but he has been in the past a quick healer.
"He is a young, fit guy but the knee is quite badly swollen and damaged. It may take a day or two until it calms down and he can have a scan but that's the nature of the injury.
"He will be ready for next season, that's for sure and he will be a better player next year and we look forward to seeing the young full-back in the Aberdeen team."