The parents of the girls aged between 15 and 17 years had planned to marry them off over the next two weeks.
"Our department warned their parents and prevented the weddings," District Women Empowerment Officer Sanjay Bhardwaj told PTI here.
The officials warned parents of the girl that marrying her off at the age of 16 is illegal.
After persuasion, parents of the three girls gave undertakings that they would not get their daughters married till they attain the age of 18.