Defenders Maik Nawrocki, Alexandro Bernabei and Yuki Kobayashi have missed out on Celtic’s Champions League squad.
Polish centre-back Nawrocki is out injured with a hamstring problem and faces a continued lay-off of about six weeks along with fellow defenders Cameron Carter-Vickers and Stephen Welsh.
The latter pair have made the 25-man squad with Welsh’s homegrown credentials a potential factor in the decision.
Celtic since signed Nat Phillips on loan from Liverpool to deal with their injury list at the back, with fellow summer signing Gustaf Lagerbielke in the pool too.
Japanese central defender Kobayashi is expected to return to fitness soon following an ankle injury but he is not listed in the squad.
Bernabei has played twice this season but has not made the cut with Liam Scales a potential back-up for left-back Greg Taylor after impressing in central defence in the recent win over Rangers.
There is also no place for goalkeeper Benjamin Siegrist, midfielder Kwon Hyeok-kyu and summer signing Marco Tilio, who arrived at Celtic with an injury, along with James McCarthy, who last featured in October last year.
Celtic begin their European campaign in Rotterdam next Tuesday against Feyenoord and also face Lazio and Atletico Madrid in their group.