Cross that bridge when you come to it
Definition 1 of 1
Pro Tip 1/3Future Uncertainty
Use when an outcome is uncertain and you prefer to wait before taking action or worrying. 
If we don't get the funding, we'll cross that bridge when we come to it.
Pro Tip 2/3Not Immediate
Suggests that the issue isn't urgent and can be dealt with at a later time. 
We might run out of supplies, but let's cross that bridge when we come to it.
Pro Tip 3/3Emotional Relief
Can be used to calm someone who is worrying unnecessarily about a future problem. 
Don't stress about the move now; we'll cross that bridge when we come to it.