The Swiss defeated Turkey 3-1 in the Group A encounter in Baku.
The win leaves them on four points and a goal difference of -1.
It wasn’t the score Scotland were hoping for. The ideal result would have been a draw, Turkey win or Switzerland by a goal.
It means Scotland are not assured of finishing above the Swiss in the table of teams in third with a win over Croatia.
Steve Clarke’s men will now have to beat their Group D opponents by two clear goals to place above Switzerland on goal difference.
They would also finish above them by winning 4-3 at Hampden Park on Tuesday and picking up no more than two yellow cards.
Realistically, however, it will be a case of beating Croatia by two clear goals or winning by one and hoping results elsewhere in the tournament go the team’s way.