Can Zaalbar be abandoned?

[Oaks]

In Kashyyyk when Chuundar take Zaalbar as a hostage so that you kill Freyyr... After you see the star map, is it possibe to just leave the planet and abandon Zaalbar? Or something will happen to prevent you from doing it?

[N-DReW25]

As the Fryer sidequest isn't mandatory for the completion of Kashyyyk it is very possible to abandon Zalbaar to Chuundar on Kashyyyk. You could complete the game without him, on Lehon, you'd straight up murder Mission without Zalbaar to intervene at all.