I have a residence permit in Norway which will soon expire. When can I visit Norway again?
If you have a residence permit in Norway, you must leave Norway and the Schengen area before your residence permit expires. If you want to visit Norway after your residence permit has expired, you can return to the Schengen area at any time after your residence permit has expired, and then stay here as a visitor for up to 90 days. The time you have spent in the Schengen area on the basis of a residence permit is not included in the calculation of the 90 days you may visit without a residence permit.
If you travel out of the Schengen area and return to the Schengen area before your residence permit has expired, you must still travel out of the Schengen area when your permit expires. If you need a visitor visa to visit Norway and the Schengen area, you must return to your home country and apply for a visitor visa there.