Hi, if you rent it out you can certainly claim the interest (and strata fees, rates and any other costs) as tax deductions.

How much rent do you think you will get?
 Work out what your outgoings (interest, strata, etc) minus rent will be.  Don't forget to take out the agents fee (unless you self manage).
This is the amount you can claim on your tax. Depending on the age of the apartment you can also claim depreciation.

Also do you expect Capital gain in the coming years? If so take that into account too.
Once you work out the figures you can assess whether it is worth keeping.
good luck.