You can carry forward disallowed passive losses to the next taxable year (in this case, to 2018).
See https://www.irs.gov/taxtopics/tc425
You can deduct passive losses from passive income and you may deduct in full any previously disallowed passive activity loss in the year you dispose of your entire interest in the activity.
Further, for rental property there is a $25,000 special allowance whereby you can deduct up to that amount of loss from other (nonpassive income), subject to a phaseout rule.
See https://www.irs.gov/publications/p925#en_US_2018_publink1000104571