なんて、信じられない

I can't believe it

→ なんて
phrase Rare #28,008
I can't believe it なんて expresses surprise or disbelief about the preceding statement. The phrase can also be translated as “I can't believe that...” when followed by a clause.
JA: あなたが来てくれるなんて、信じられない。
EN: I can't believe you came.

医者が食べるって言ったのを食べるなんて、信じられない

I can’t believe you ate something the doctor told you not to eat.

トムがまだ独身なんて、信じられない

I can't believe Tom is still single.

二人が結婚するなんて、信じられない

I can't believe those two are getting married.

こんなことするなんて、信じられない

I can't believe you would do something like this.

君が本当にハーバード受かったなんて、信じられない

I can't believe you actually got into Harvard.

トムが私を覚えているなんて、信じられない

I can't believe Tom remembers me.

トムメアリーそんなことしたなんて、信じられない

I can't believe Tom did that to Mary.