I bought a 3:00 pm ticket for the tour but i just noticed that it closes at 3. will still get chance to complete the 3 hour tour?

3pm tours are available every day, no difference with other schedules, you'll see it all

If there is a tour at 3pm. It will be complete like the other ones... Maybe the last tour be at 3pm...

No. Since the place closes at 3pm. It's expired

I'm guessing the last time for starting a tour is 3pm.