When we masturbate for 3-4times in 24 hours(1 day),can it stunt our height growth?can it affect growth by testosterone level or anything?

Masturbation will not stunt your growth. However, you need to engage in productive activities as excessive masturbation may not be good for your mental health. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines. Wish you good health.