Mdjazil Said:
"How to restore deleted phone in find my phone: I was tracking my lost phone and it suddenly stopped showing the device on find my iPhone and I received a email saying the device has been removed from my iCloud. So now how can I get back the location or details."
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Secure your Account:
If it has been removed, then someone has likely gotten in. So, secure you account.
A. Verify Your Devices:
Verify that your the devices logged in to your account or officially yours, by using this link: Check your Apple ID Device List to See where you're Signed in - Apple Support
B. Consider Modifying your Credentials:
By all means, consider modifying your credentials, starting with a new password.
C. Change the Password and Passcode: