Sambora suddenly left the band ahead of a show in Calgary, Canada on April 2, but Jon said he hasn't fallen out with him over finances, as suggested by some, reported Contactmusic.
"I think Richie's doing all right, I haven't spoken to him. We were surprised. It was 3:30 pm on show day on Tuesday and we got a phone call that he wouldn't be there. It's a personal matter. Don't believe what you read because it's the furthest thing from the truth," John said.
Jon also discussed the band's 'What About Now' album, saying his main inspiration was rock 'n' roll legends The Rolling Stones.
"It's a wide array. I just downloaded David Bowie's record to listen to that. I just bought a Bruno Mars record before that. Influences? Tom Waits. Leonard Cohen.
"They're huge lyrical influences. For rock bands, I look to the Stones, who at least show me where the bar is so you know how far and how high I gotta jump," he said.