regex javascript not allow certain charter in first n positions

I need help with RegEx for javascript that will not allow specific character, asterisk in my case, in first N positions (first 3 for example).

    /^(?!.*\*).*$/  - will prevent asterisks at all
    ^[^\*] - doesn't allow asterisk at first 
    /^[^*]{3}/ - is expecting at least 3 characters

So how to do no asterisk at first n (3 for example) characters ?