run out of time
To no longer have any time to finish some task or activity. I felt pretty good about how I was doing on the test, but then I ran out of time before I got through the final section. Let's try to polish up some of the details on the project before we run out of time.
run out of time
to have used up most of the allotted time; to have no time left. You have just about run out of time. I ran out of time before I could finish the test.