Winger Darcy Graham will miss Scotland’s Six Nations opener against Ireland next Saturday due to a knee injury.
The Edinburgh back could also miss the match with England, Scottish Rugby having said that ligament damage will keep him out of the “opening rounds”.
Meanwhile, Worcester Warriors fly-half Duncan Weir has been added to the squad in place of Finn Russell.
Russell was disciplined for a “breach of team protocol”.
The incident related to alcohol consumption and a missed training session, so the 27-year-old Racing 92 fly-half was told he would not be considered for the trip to Dublin.
Weir, who earned the most recent of his 27 caps in the 2017 Six Nations, will not link up with the Scotland squad until after Worcester’s home Premiership derby game with Wasps on Saturday.
He is the only addition to the 34-man group who will travel to Spain on Sunday for a training camp, with Edinburgh prop Jamie Bhatti, Glasgow Warriors back-row Tom Gordon and Sale Sharks wing Byron McGuigan joining Russell as players from the wider squad not to travel.