Select your country. Then fill out the your phone number along with the Re-captcha, and click on message button i.e. send. (Refer image below)
Unlist phone number
You will now receive a confirmation message that your number has been successfully unlisted. It may take 24 hrs for the change to come in affect.
Phone number successfully unlisted
After that if you go and run a search in truecaller with your number, you will not find your name.
This is how you can unlist number from truecaller.
If you really have some serious privacy issues, then you can freely opt for this option. But Truecaller is a great directory where you can find the name of many unknown numbers. So i would suggest that you don’t unlist, unless and until its a serious matter.