Prevent event enrollment until membership is paid for

Are you referring to a setting to not allow registration if they have an overdue balance on membership dues, but have yet to be suspended?

The Suspend after X days field does not work for us because we are One Time Price as opposed to a regularly billing frequency (at least this is what support told us, and also when I tested, the overdue account was not suspended after x days of purchase).   Currently we have no way of forcing people to pay their memberships short of manually cancelling or suspending them, yet while they have unpaid one time price fees, they can still register for our events