Do you mean in your login form on your website, you don't want the user's password manage to fill the form? There is an article on MDN about it, but it sounds like you will have a difficult time bypassing it: https://developer.mozilla.org/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion

Yeah, I'm using autocomplete attribute and password isn't inserted automatically. But the browser suggests saved passwords in dropdown after double-clicking on the input field. I want to get rid of it.