The source explained to People, "They want a small wedding, but it seems impossible to do even that right now."
"They were talking about early 2021, but they have decided to wait until they can have a small group of family and friends attend," the insider added.
Although their wedding might be on hold, it doesn't sound like they will have to wait too long. According to the source, they still hope to celebrate by the summer.
In the meantime, they are enjoying the anticipation ahead of the wedding. "Gwen is still emotional about the engagement and can’t believe how lucky she is to be with Blake," the source said.
Plus, according to the insider, they have grown even happier since becoming engaged.
"She didn't think the engagement would change her and Blake’s relationship because it felt like they were already married, but it has sparked even more happiness," the source explained.
"She can’t wait to be his wife," the insider told the outlet. "The wedding has given her something amazing to look forward to in the new year."
As for where their wedding will be, sources say that they will likely celebrate at a chapel on Shelton's ranch, which you can see in the background of their engagement photos.