What style of beer is it? Extract or all grain?
I might just throw in my flavor/aroma hops now and be done. It would be less bitter than with a full 60 min boil, but shouldn't suffer any other ill effects.
Unless... It is an all grain beer with lots of pilsner malt in it. Then you would definitely want to boil for 60 or 90 minutes to boil off DMS precursors.
If you do decide to restart the boil later, the beer will be a little more bitter than normal, but should suffer no other ill effects.