Maton was optioned to Triple-A Lehigh Valley on Friday.
The young infielder spent the past week in the majors but will head back to Triple-A with Didi Gregorius (elbow) returning from the injured list. Maton has a .265/.328/.398 slash line in 45 major-league appearances this season and could rejoin the Phillies later on this season if additional infield depth is required.