What to do with credit card debt… let it go?

So I have a credit card that has about 10k on it (I had to finance a lot for family reasons) and they have shut it off. I missed probably 3 payments.

Now I’m on a program where they reduced it to 1%apr and just have to make a couple hundred a month payments to pay it down, which is still kind of rough.

What would happen if I wasn’t able to pay it off monthly