Hello,

For CDS (Combined Defence Services) exam conducted by the UPSC (Union Public Service Commission) for admission to the Indian Military Academy (IMA), the eligibility criteria regarding age are as follows:

1. Age Limit :
   • Unmarried male candidates born not earlier than 2nd January 2001 and not later than 1st January 2006 are eligible.

Since your date of birth is 3rd May 2003, you fall within the eligible age range for the CDS exam.

2. Number of Attempts :
   • There is no restriction on the number of attempts for the CDS exam as long as you meet the age criteria.

Therefore, you have as many attempts as you need until you cross the upper age limit (which is usually around 24 years for CDS IMA, but it's always best to check the latest notification from UPSC for any changes).

As of now, based on your age, you are eligible to appear for the CDS exam and have multiple attempts remaining.

Good luck with your preparations!