Norwich City defender Grant Hanley has pulled out of Scotland's squad for the friendlies against the Netherlands and Northern Ireland.
The 32-year-old was recalled for the games on 22 and 26 March after a long lay-off with an Achilles injury.
Hanley returned to Steve Clarke's squad after playing eight times for the Canaries this year.
The centre-backs still in the squad are Scott McKenna, Jack Hendry, Liam Cooper, Ryan Porteous and John Souttar.
Kieran Tierney is also often used as the left-sided central defender in Clarke's preferred 3-5-2 formation and no replacement for Hanley has been called up.