These players will benefit from additional training sessions and treatment during the break. Defenders Harry Maguire and Luke Shaw were left out of Thomas Tuchel's England squad, along with midfielders Kobbie Mainoo and Mason Mount.
They will join Tom Heaton, Tyler Fredricson, Diego Leon, Noussair Mazraoui and Joshua Zirkzee at Carrington during the break to maintain their fitness levels ahead of the Premier League's return and a derby against Manchester City. Matheus Cunha, who was expected to join his international team-mates this week, has been forced to withdraw from Carlo Ancelotti's Brazil squad due to an injury sustained against Burnley, while Diogo Dalot has pulled out of the Portugal squad.
United face a crucial spell once the Premier League resumes. Following the derby at the Etihad, they face Chelsea, Brentford, Sunderland, Liverpool and Brighton before the end of October.
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United's international call-ups:
Bruno Fernandes and Diogo Dalot* - Portugal
Casemiro and Matheus Cunha* - Brazil
Matthijs de Ligt - Netherlands
Andre Onana and Bryan Mbeumo - Cameroon
Benjamin Sesko - Slovenia
Manuel Ugarte - Uruguay
Altay Bayindir - Turkey
Patrick Dorgu - Denmark
Amad - Ivory Coast
Leny Yoro - France U21s
Ayden Heaven - England U20s
Chido Obi - Denmark U21s
* - notes player has since withdrawn from the squad.