You want to extend Temporary work contracting

If you have a visitor’s residence permit because you are working in Sweden temporarily on behalf of a business by which you are employed in another EU country (where you are permitted to be) you can apply to extend your residence permit.

You want to extend – Visiting Sweden for more than 90 days

The Swedish Migration Agency is responsible for considering applications from people who want to live in Sweden, seek protection or become Swedish citizens. Our work is based on Swedish laws and international conventions, with a focus on legal certainty and effective reception and return.