Haidara Soualiho's charges get their 10-day training camp underway on Monday before they leave for tournament which is scheduled to take place in Japan.
Diallo's United teammate Eric Bailly, AC Milan's Franck Kessi and Max Gradel are the three overaged players in the squad.
The West African outfit were drawn in Group D alongside Brazil, Germany and Saudi Arabia.
Goalkeepers: Ira Tape Eliezer (FC San Pedro), Nagoli Oupoh Maxime (Sol FC,), Tie Nicolas (Victoria Guimares).
Defenders: Kouao Koffi Franck (FC Vzela), Ouattara Zie (Victoria Guimares), Singo Wilfried (Torino), Eric Bailly (Manchester United), Dabila Kouadio Yves (Mouscron), Diallo Chester (Ajaccio), Gnaka Silas (KAS Eupen).
Midfielders: Eboue Christ (Genk), Doumbia Idrissa (Sporting Lisbon), Franck Kessie (AC Milan), Amad Diallo (Manchester United), Max Gradel (Sivasspor), Dao Youssouf (Sparta Praha).
Forwards: Timite Cheick (Amiens), Kouame Christian (Fiorentina), Bayo Vakoun (Celtic Glasgow), Keita Mory (Ursl Vise), Keita Kader (Kvc Westerlo), Doumbia Aboubakar Junior (Maccabi Nitanya)