Hire companies in the U.K. do a check in the DVLA database before hiring a car out, and most have a policy that they will not hire to someone with a DR10 or a DR30 for 5 years from the date of conviction.
in theory, hiring a car abroad should have the same restrictions as these companies are multi-national but in many countries there are no checks carried out when you hire, nor do they even ask for the DVLA confirmation code that you are supposed to print out before you go abroad.