Camus would call Buddhism, and other religions, "philosophical suicide", because you're basically believing in a made-up justification for your existence and what its purpose is.

Stoicism is a guide on how you should live your life: stay in the place that was given to you at birth, and be satisfied from it. So Camus would call it "philosophical suicide" too.

Camus commands you to accept fully that your life has no purpose despite how bad you would like the Universe to give you one, and then choose to continue living on anyway. This desire for meaning vs the lack of answer from the Universe is what Camus labels "absurd".