The most dangerous and deadly cat in the world is actually a small cat called the black footed cat that a lot of people have never heard of.
Although larger cats such as lions, leopards and even tigers are dangerous if you encounter them and get into attacks with them they are not considered the most dangerous cat in the world.
If you come up against a small cat like the black footed cat then it can be even more deadly to a human or other prey than a tiger, leopard or lion would be.
The black footed cat hunts among the short desert scrub in the Karoo of South Africa.
Black footed cats are mostly found in South Africa so it's unlikely that you would come up against a black footed cat in some other places although it could be possible.