Three Virus is in my phone, and my information might get stolen. How could I get it out?

As others have clearly stated, what you are seeing is a typical scam. Here are Apple documents with reference to that:

About pop-up ads and windows in Safari - Apple Support

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Without exception, all messages or emails or pop-ups telling you that you have a virus or viruses are scams, desivned to suck you into pahying for expensive and useless software, or as a phishing attempt to steal your data. No-one can detect remotely whether you have a virus, and as stedman1 has said you don't have one anyway - as long as you haven't done something silly like jailbreaking your phone or downloading dubious itemd from even more dubious websites, you won't get one.

General rule: neveri follow links or ring telephone numbers in unexpected emails, no matter who they appear to come from.

There are no virus on your iPhone. Not 1, not 3, not 100.

Where are you seeing the bogus warning messages?