De o governo do Canadá website
Time spent living in Canada
When you are a permanent resident, you can live outside of Canada, but must live in Canada for at least two years in a five-year period. If you live outside of Canada for longer, you may lose your permanent resident status.
For more information on how long you have to live in Canada, see Appendix A: Residency obligation of the PR card application package.
Do Apêndice A: Obrigação de residência:
Minimum residency obligation
You must meet the residency obligation to get a PR Card.
If you have been a permanent resident for five (5) years or more
- you must have been physically present in Canada for a minimum of 730 days within the past five (5) years.
If you have been a permanent resident for less than five (5) years
- you must show that you will be able to meet the minimum of 730 days of physical presence in Canada within five (5) years of the date you
became a permanent resident.
Parece que você passou muito tempo fora do Canadá e pode remover sua residência permanente. Eu contataria sua embaixada ou consulado canadense local.