The diminutive left back is in his seventh season in MLS, all of which have been spent with the Dynamo
The 27-year-old will only be with the team for the Belgium match, and will be back with the Dynamo in time for the team's June 1 match at Columbus.
With Edgar Castillo participating in the Copa Libertadores and Fabian Johnson in a promotion/relegation playoff, the USA will be short at left back for the Belgium match, which prompted Ashe's call-up.
The U.S. will take on a very strong Belgium squad on May 29 at FirstEnergy Stadium in Cleveland. Kickoff is at 8 p.m. ET on ESPN2.