Dear
@Amerbqking,
thank you for contributing to our community.
Well as to your questions, it depends as the apssport is not property of the German government you will have to return it to Syria. But if you have not another national than the syrian one you are obliged to keep the passport, as an Identity Document and travel document.
I hope I could assist you, if you need further guidance please do not hesitate to contact us.
Best regards,
Nilab