There are several possible scenarios. If you saw it listed online for rent and has disappeared, it could have been rented, or depending where you saw it, it could have been a fake listing that was cloned from the listing for sale. This has become increasingly common, so beware of rental listings with prices that are too good to be true! As others have said, only the listing agent will know the situation for sure, so contact the agent directly since we don't know that address and can't assist with that. Your best bet is to work with an agent to help you find current listings that will best meet your needs. Good luck!