They are considered to be a part of the AFC ( Asian Football Confederation). Even though they're not part of Asia they play with Asian countries. It's like Israel, Kazakhstan, Armenia, Turkey,etc. in Europe.
It says that it also counts in countries that are not geographically in Asia but participate in the Asian qualifying. Australia meets this requirement.
Yeah if I'm not mistaken India was supposed to play in a tournament but then their players did not want to play with shoes, so they withdrew from the competition.