Islamabad is 3 hours ahead of Helsinki
Best overlap: 8:00 AM to 3:00 PM in Helsinki is 11:00 AM to 6:00 PM in Islamabad.
For a call that suits both sides, look at 8:00 AM to 3:00 PM in Helsinki / 11:00 AM to 6:00 PM in Islamabad. Because you share 7 hours of the workday, there's no need to compromise; book the time that suits the meeting, not the map. Remember that Helsinki shifts for daylight saving and Islamabad doesn't, so recalculate the overlap after each clock change.