Stephen Paddock smuggled 23 weapons into the Mandalay Bay hotel in Las Vegas while the Route 91 Harvest country music festival took place across the road.
The attack is the deadliest in American history, with 58 people killed and a further 527 injured.
It was during Jason’s set during the country music festival that the mass shooting took place and the star has now announced that he will be taking a break from his tour.
Taking to social media, the singer announced that his up-coming gigs in Los Angeles, San Diego and Anaheim would not be going ahead, with his tour resuming on 12 October.
He wrote on Twitter: "As a result what happened in Las Vegas this week, we have decided to cancel this coming weekend's shows.
"I feel like out respect for the victims, their families and our fans, it is the right thing to do.
"It has been an emotional time for everyone involved this week, so we plan to take some time to mourn the ones we have lost and be close with our family and friends.
"Our plan is to resume the tour the following week in Tulsa, Oklahoma. Our first time back onstage will be a very tough and emotional thing for us, but we will all get through it together and honor the people we lost by doing the only thing we know hot to do – play our songs for them.
"I hope everyone understands why we can't play this and I'm sorry if anyone is disappointed.
"I want to say thank you for the outpouring love from my friends and fans we have received over the last couple days. You guys have no idea how much you have helped get us through this tough time.