Kristi Montgomery has been given a first call-up for Scotland after Kieran Tierney and Kenny McLean dropped out of the Nations League squad.
The Blackburn Rovers midfielder has been promoted from the Under-21s by new head coach Sebastien Pocognoli for the games against Slovenia (twice), Switzerland and North Macedonia.
The 22-year-old has started all eight Championship matches for Tony Mowbray’s side this season.
Celtic defender Tierney and Norwich midfielder McLean have 119 international caps between them, while experienced trio Scott McTominay, Che Adams and Lawrence Shankland were unavailable before Pocognoli made his picks.
Montgomery is the eighth uncapped player in the 27-strong group, joining Luke Graham, Robbie Ure, Luis Binks, Colby Donovan, Jon McCracken, Josh McPake and Stephen Welsh.
Oli McBurnie, Scott Bain, Kieron Bowie, Josh Doig, Lennon Miller and James Wilson were recalled and Napoli midfielder Billy Gilmour returns after missing the World Cup through injury.
Dominic Hyam, Lyndon Dykes, George Hirst, Grant Hanley, Anthony Ralston and Ross Stewart are among those overlooked by Pocognoli, with Manchester United teenager Tyler Fletcher in the Under-21s after taking Gilmour’s place in the USA.