Is there a casual way to say "this can wait" on a positive note

Solution 1:

Put it in the 'pending' tray Don't file it. Put it where it will be kept under review.

Let's put it on the back burner. In other words let it bubble away and we will see to it shortly.

Kick it into the long grass It will be out-of-sight and out-of-mind. Hopefully everyone will forget all about it.

Solution 2:

I think not pressing.

This item is valuable but not pressing.

By using pressing, you make the temporal urgency negative in tone and thus it negation has a positive tone. (Note that the tenses are opposite).

Solution 3:

In a business context, you frequently hear "let's table that for now."

Solution 4:

In addition to WS2's idioms, I might recommend add it to the bucket list, or, it's on the bucket list, meaning, I want to do it before I die (kick the bucket).

Solution 5:

Perhaps

on hold for now

on hold for the moment

Both suggest that it needs to be dealt with in the (near) future.