Swindon exited the Leasing.com Trophy after their second game following a 3-0 defeat to Plymouth Argyle at the County Ground.
Goals from Zak Rudden, Joel Grant and Joe Riley were the difference in the first of two fixtures between the two sides this week.
After Town had previously been beaten by Chelsea Under-21s, in the first week of the season, this result ends their campaign in the comepetition.
Full debuts were handed to Taylor Curran and Steven Benda; however, Curran's bow was shortlived as he came off with concussion in the first half.
Benda was, according to Richie Wellens, Town's best player making a string of fine saves to limit the score to three.