Bring first 3 ingredients to a boil in a Dutch oven, stirring constantly; stir in sugar. Return to a boil; boil, stirring constantly, 1 minute. Remove from heat; skim off foam.
Pour hot jelly into hot, sterilized jars quickly, filling to 1/4 inch from top; wipe jar rims. Cover at once with metal lids, and screw on bands.
Process in a boiling-water bath 5 minutes.