Your employer may try to suspend your apprenticeship but you do not need to agree - your apprenticeship can only be suspended through mutual agreement.
Instead you could be stood down with or without pay depending on your award or agreement. This is a better option as that way you can resume your apprenticeship when work picks up again.
We also recommend apprenticeships get an up to date list of competencies/their trade profiling signed off by the boss so that they have documentation of their work and training completed to date.
Also if possible under the changing circumstances we recommend that apprentices continue to attend TAFE (online of course!), whether you are suspended or not.