My name is khan umar. But on my degree certificate , it is mentioned as khan umar , leaving triple space between first and second name. Should i get it changed or is it fine for job verfication or admissions?

If the name is Khan Umar and same is on the degree certifcate then why you would need change. The space in between would not matter.

There is no difference in your name except for the additional space in your degree certificate.

This will not alter your name neither it will render your name as invalid, hence you can remain silent ignoring this as minor or petty issue