You can lose your permanent right to reside in Norway
If you stay outside Norway for a continuous period of more than two years, you will lose your permanent right to reside in Norway. The same exemptions that apply to the calculation of absence when you apply for permanent right of residence also apply here.
In general, in order to reapply for permanent right to reside in Norway at a later time, you must first have stayed in Norway continually for another five-year period.
UDI can also revoke your permanent residence certificate if you have provided incorrect information to the immigration authorities, if a refusal of entry or stay has been imposed on you rejected, or if you have been expelled from Norway.