I was being ushered into an arena with 1000s of people waiting - lavishly dressed up like a princess (so not me). Had to enter through an archway that initially had three humongous, solitaire engagement rings as the entryway I had to walk through. As I approached the entrance, the third ring and furthest from me just slowly disappeared, so there were only two rings left for me to walk through. Then I woke up.
Maybe the rings symbolize God's commitment ( remember Jesus has talked about the wedding and Him being the bridegroom plenty of times) to you but there might be something in your life that's keeping you from the best God has for you.
Rings in general speak of covenant and often of an eternal covenant when they are wedding/engagement rings. Walking through the rings would represent steps in the journey of your spiritual covenant with the Lord. The third ring disappearing may speak of how your commitment has changed and become easier to walk out over time.