The Newcastle United winger, 28, has been selected in Alex McLeish’s 24-man squad for the International Challenge matches.
They are set to face Peru at the Estadio Nacional in Lima on Tuesday, 29th May, with kick-off set for 8pm local time (2am BST).
And McLeish’s men follow up that game with a clash with Mexico at the Estadio Azteca in Mexico City. That game is set to kick-off at 7pm local time (1am BST) on Saturday, 1st June.
Ritchie currently has 16 caps and three goals for Scotland, after making his international debut in March 2015.