Three Uganda Cranes players missed the first training session conducted on Thursday night at the Jebel Ali training centre in Dubai.
The three players are Alexis Bakka (Umea FC), Alex Kakuba (CD Cova Piedade) and Edirisa Lubega Torres (Paide).
Bakka and Kakuba have consequently arrived on Friday morning while Edirisa Lubega is expected to jet in later in the evening.
Denis Onyango and Derrick Nsibambi pulled out while Alionzi Nafian was dropped.
Uganda is using the training sessions to sharpen for the South Sudan double header in AFCON Qualifiers next month and CHAN finals next year.
Players who took part in the first training session in Dubai.
Charles Lukwago (KCCA, Uganda), Joel Mutakubwa (Kyetume, Uganda), Milton Karisa (Vipers, Uganda), David Owori (SC Villa, Uganda), Bright Anukani (KCCA, Uganda), Saidi Kyeyune (URA, Uganda), Paul Mbowa (URA, Uganda), Samuel Kato (KCCA, Uganda), Halid Lwaliwa (Vipers, Uganda), Ibrahim Orit (Vipers SC), Shafiq Kagimu (URA, Uganda), Karim Watambala (Vipers, Uganda), Bevis Mugabi (Motherwell, Scotland), Farouk Miya (Konyaspor, Turkey), Nicholas Wadada (Azam FC), Elvis Bwomono (Southend United), Salim Jamal (Al Hilal Omdurman, Sudan), Roy Jayden Onen (Reading, England), Joseph Ochaya (TP Mazembe, DR Congo), Allan Kyambadde (El Gouna, Egypt), Allan Kateregga (Erbil SC, Iraq)