This is exactly what you can do with Traverse.link (well you'd currently have to put your markdown files into a single JSON but I'm working on that). Your markdown notes then become flashcards, but the twist is every note has a "Remember" switch, which you can simply turn off to remove it from your spaced repetition schedule (without losing the note)

> import cards from a directory of Markdown files

Anki supports CSV as an option for import. How about you convert the markdown files to CSV and import it? Recently I used it just for fun to import all the sentences from Faust and put them in a spreadsheet with LibreOffice Calc. I made it separate all the sentences by dots, and added another column with translations of the file thanks to DeepL. Converted it to CSV and it worked out, sentence and translation cards done.

that would be 'suspend' button

Thank you. I'll try it. I thought it's meant to do what it says - suspend a card temporarily.

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.

I think you want the “delete” button.

I believe I could never find it.

Hit delete on the keyboard when you are viewing the card.

On the phone the option is there but I believe its nested under options.