Where can I do iq testing in Singapore

Congrats on your little ones development. MOE SG suggests to only have your child tested for giftedness after the age of 5. Take your time and enjoy preschool days :) By the way out of 100k population, usually about 3 are considered to be exceptionally gifted.

Try to check at Mensa Singapore : https://www.mensa.org.sg

Check with Thomson Pediatric Centre.

You could try Mensa Singapore