Scotland have called up midfielder Stuart Armstrong for the Nations League games against Croatia and Poland as attackers Che Adams and Lewis Morgan withdraw from the squad.
Vancouver Whitecaps' Armstrong, 32, last featured for the Scots as a substitute in their final match at Euro 2024, the 1-0 defeat by Hungary.
Head coach Steve Clarke now has a 24-strong squad for Friday's home match with Croatia and Monday's fixture in Poland.
Clarke's side have taken one point so far in Group A1 and are three points behind Poland.
That point was secured in their last game, a 0-0 draw at home to leaders Portugal, which followed narrow defeats by Poland at Hampden and away to Portugal and Croatia.