The only way to get an accurate and reliable answer to your question is to check with the nursing school itself. If they allow a third try, it would be best to look carefully at why you failed the test twice, and learn what areas you need to study the most. If they don't allow a third try, you may need to check out other schools that may use a different entrance test. Or take a step back and try a different approach to nursing altogether, such as trying LVN then bridging to RN/BSN. Best of luck in whatever you decide!