Prospective Marriage Visa Subclass 300 is a temporary visa that allows you to go to Australia to marry your prospective spouse and then you can apply for the permanent visa. With partner visa subclass 300 you'll stay in Australia for up to 9 months from date of grant of visa. In order to obtain visa subclass 300, you can contact us for registered Immigration agent Perth. So reach us at any time for hassle-free migration services.