Rahul, along with close friend and "Bigg Boss" housemate Sambhavna Seth, spent hours hunting for the perfect ring.
"This ring signifies Rahul's love and commitment to his future wife! I am so happy that I was there to help him make this important decision, " said Sambhavna.
"I am very sure that his future wife will feel loved and privileged to receive this beautiful ring!" she added.
The top three finalists are Nikunj Malik, Dimpy Ganguly and Harpreet Chabra.
The show "Rahul Dulhaniya Le jaayega" airs on NDTV Imagine and had started with 12 prospective brides.