The country star, 32, married Harker on Sunday in front of 200 guests, reported People magazine.
Harker, 32, wore a champagne Vera Wang dress for the occasion, adorned with bow details and a long train.
"I thought it was so classic, it seemed right. This was one of the only dresses I saw that had that old-world elegance to it. I think it's just really, really beautiful," she said.
Paslay wore a custom-made black suit that featured pin-stitching details from C McGill by Only One Tailoring.
After the exchanging of vows, guests made their way into the reception area, which featured a covered pavilion that housed the dance-floor and catering, a side yard with cornhole boards, farm tables and beautiful quilts adorning the lawn, and bistro tables lining the pool area.