This is Iran's final chance to get a deal. The Pakistanis are also close to losing patience with Iran. So is Trump.
At the same time, Pakistan better hope that no deal gets signed under the current conditions because any such deal will be very short lived. And when such a deal collapses, Pakistan may get some of the blame for such a bad deal.
It will be much better for Pakistan if no deal is signed under the current conditions. At least Pakistan will be able to say "we tried" and move on.