Thank you. I'll try it. I thought it's meant to do what it says - suspend a card temporarily.
I think you want the “delete” button.
I believe I could never find it.
What you want is the bury option, that one will no longer show the card in reviews (but it won't delete it)
Bury (Press = when reviewing) makes Anki not show you a card until the next day. Suspending (! to suspend all cards based on a note [if you have more than 1 cloze on a card, it will stop showing you all of them], @ just to suspend that one card) will make Anki never show you a card until you unsuspend it in the browser.