The Ozzy Osbourne-fronted rock group announced in November that they will reform for a new album and a series of concerts worldwide this year.
However, tour plans were scaled back after guitarist Tony Iommi was diagnosed with cancer and drummer Bill Ward threatened to pull out of the reunion, with Black Sabbath announcing this month that the full lineup will now only play one European date, at the UK's Download Festival on June 10.
Speaking to the VH1 Radio Network recently, Sharon insisted that the ongoing troubles will not result in US fans missing out.
"They're gonna be doing one show in America this summer but I can't say yet [where and when it is] because we can't announce it, the promoters have to," she said. "But they are doing one show in August."
On how Black Sabbath's comeback album is progressing, she teased: "They're doing really well in the studio. Gosh, they must have written 15 new songs already and it's going great."
Earlier this month, Sharon denied that she had fired Ward from the reunion, stating that she only manages her husband and has no power over the Black Sabbath lineup.
Watch the music video for Black Sabbath's 'Paranoid' below: