You should be entering these rentals every year on your US return. The losses this year are deductible for you on your US return as long as you have been reporting the gains every year when you had rent income? You can't decide to report the losses and not the years where you earned money. So if you haven't been reporting this rental property I recommend going back and adding it in in amended returns for every year that you have had it.
You can claim taxes that you pay in foreign countries against income. If you have no income for the year you can still claim the foreign taxes paid but they are carried forward into the next year.
@aashlyps
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