Hooker Jamie George and five-eighth George Ford will co-captain the group, which contains 10 uncapped players, for two Tests against Argentina and one against the United States.
Exeter wing Feyi-Waboso was sent off for a high tackle on Antoine Hastoy in the first half of Saturday's 26-24 loss to a France XV on his first appearance since suffering a dislocated shoulder in December.
Due to his ban, the 22-year-old will been unavailable for the matches against Los Pumas on July 5 and 12 in La Plata and San Juan respectively.
Subject to completing a tackle course, Feyi-Waboso, who has scored five tries in eight international caps, will return to contention for the clash with the US on July 19 in Washington DC.
Joe Carpenter, Seb Atkinson, Guy Pepper and Oscar Beard, who were involved in the non-capped contest with France, are joined in the squad by fellow potential Test debutants Charlie Atkinson, Arthur Clark, Emmanuel Iyogun, Will Muir, Luke Northmore and Max Ojomoh.
"For some of the younger players, this will be their first experience of touring overseas with England. Travelling together helps strengthen team bonds and offers a valuable chance for new players to integrate into our environment," said head coach Steve Borthwick.
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