I’ll cross that bridge when I come to it is an expression that means you will not worry about a possible future problem but will deal with it if it happens.

For example, I don’t know how we’ll pay the bills if you quit your job, but we’ll cross that bridge when we come to it.

The job interview is a week away, so I’m not worried about it yet — I’ll cross that bridge when I come to it.

“Where will we stop tonight?” “At the next town.” “What if all the hotels are full?” “Let’s cross that bridge when we come to it.”

Tradução: lidar com o problema quando ele chegar.