Can a homeowners insurance policy be cancelled if the homeowner is out of the country and the property left vacant?

Ye, reference the vacancy clause of your homeowners insurance policy. Most policies contain language that require you notify the insurer within a certain time frame of extended periods of vacancy.

To avoid unexpected cancellation of coverage due to occupancy issues, be sure to properly list your occupancy type. Certain types of residences may be listed as, vacation homes, vacant property, temporary or seasonal homes.