Garth Brooks may be hitting pause on his stadium tour.

Following the country singer's sold-out shows at Arrowhead Stadium in Kansas City, Missouri, on Aug. 7 and at Memorial Stadium in Lincoln, Nebraska, on Aug. 14, he will not perform for three weeks while his team assesses how to proceed amid the ongoing COVID-19 pandemic, Brooks' representative said Tuesday.

Additionally, ticket sales for the show scheduled in Seattle on Sept. 4 will be halted.

"It breaks my heart to see city after city go on sale and then have to ask those sweet people and the venues to reschedule," Brooks said in a statement. "We have a three week window coming up where we, as a group, will assess the remainder of the stadium tour this year.

"It's humbling to see people put this much faith in you as an artist, and it kills me to think I am letting them down," he added.

In recent weeks, cases of COVID-19 have increased across the country as the delta variant continues to spread. The Centers for Diseases Control and Prevention is now recommending that people who are fully vaccinated wear masks indoors in public places in areas of high transmission.

Just 58.2% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the CDC.