No you shouldn't there is chance overall they would hire you besides your stuttering, job market is sh\*t, even if they dont pick you, the result is the same as you would withdraw, you just destroy possible chance. It may be country related - on how society treat stuttering and other disabilites, because I think in my country, stuttering have bad vibe, like they looking through stereotypes and stuttering sounds like something weird, that person is lying, then they will be contact in you while no answear back. So no, you dont lose anything, train more. #