If you are planning to stay longer than 90 days, you need to apply for a visitor's permit. An application for a visitor's permit is always sent to the Migration Agency in Sweden, where the decision is made.
To be eligible for a visitor’s permit, you must
It is important to submit all the required documents. Missing documents may cause rejection of the application.
1. Application form, completely filled, signed and dated;
2. Family details form, completely filled, signed and dated;
3. Passport and copy of the pages that shows personal information and all pages in the passport that show entry and exit stamps and visas;
4. A copy of a valid residence permit in another Schengen country if you already have one;
5. Travel insurance. The insurance should cover costs of at least EUR 30,000 and be valid in all Schengen countries.
6. For visiting a relative, friend or partner;
See the following link for more information and required documents for the other catogories. https://www.migrationsverket.se/English/Private-individuals/Visiting-Sweden/Visiting-relatives-and-friends/Longer-than-90-days.html
You need to book online appointment for Consulate General in Istanbul to submit your application. Please click here to book an appointment.
A national visa (D-visa) is only issued in exceptional cases. According to the law special circumstances must apply in your case. Note that a family visit is not considered special circumstances, neither that the processing time for a visitor's permit might be longer. The fact that you have previously been granted a D-visa does not automatically mean that you can get a new one.