How can I get flash player for ipad 3?

Adobe has not made a version of Flash for the iPad.

Kappy explains why. https://discussions.apple.com/thread/4259344?answerId=19446567022#19446567022

Skyfire and Puffin are alt. browsers

5 Flash Player Alternatives

http://www.techshout.com/features/2011/01/flash-player-for-ipad-apps/

Top 4 browsers supports flash player on iPad and iPhone

http://mashtips.com/flash-player-ios/

You can't. There are a few browsers that claim to allow some Flash content but some of the reviews for some of the browsers are not that great. Photon, iSwifter, Sky Fire .... Check those out.