The wedding presented a major challenge for Kardashian in that parts of the ceremony were being filmed for Keeping Up With the Kardashians, not to mention the swarms of paparazzi snapping the family's every move.
He decided to hop a last-minute flight back to the States after seeing photos of himself in the press.
"There were cameras at the airport on our trip and I was very unhappy with the person I saw in all the pictures," Kardashian explains. "I'm upset I missed my sister's wedding, but it was a personal decision."
MORE: EXCLUSIVE: Rob Kardashian Is 'Still Filming' Reality Series With Blac Chyna Amid Split Rumors, Social Media Absence
Missing the wedding was the beginning of Kardashian's drastic retreat from the public eye. He rarely left the house, and stopped filming the family's reality series.
"I just wasn't down to have photographers follow me, so I made sure I was away from all of that," Kardashian shares. "I'm very good at disappearing."
A lot has changed in the USC grad’s life since Kim K tied the knot. With the help of fiancee Blac Chyna, Kardashian got back on a weight-loss regimen, and is feeling less camera shy than in recent years.
See just how cute Kardashian is with Chyna in the video below.