Steps for pausing an event: -
Step 1: Go to the dashboard, and from the left side of the page click on "Event" and choose the event you want to pause (view details).
Step 2: Click on the "More Actions" button and it will give you an option to pause/end the event. Click on the "Pause Event" button to pause the event, which will restrict attendees' entry into the event.
You can re-start the event whenever you want.