My flight has been delayed, so I will not be able to collect the car at the time I have specified when I made the reservation.
Will I loose my rental car booking?
Please refer to your voucher as it contains the specific information about the terms and conditions that apply to your reservation.
Some companies as Budget allow a delay up to 15 hours (even without being notified by the renter of their delay) before they apply the No-Show policy so the renter loose their confirmed reservation.
Again, please refer to your voucher as the No-Show policy is comprehensively explained on there.