NBA: Frye out indefinitely with enlarged heart
Doctors discovered the condition during a routine echocardiogram and will monitor Frye ahead of a re-evaluation in December before allowing him to take part in basketball-related activities.
"Nothing is more important to us than the health and well-being of our players," Suns president of basketball operations Lon Babby said.
"Channing and his family have the full support of our organization. His health is our primary concern and we are committed to helping him in any way he needs."
Frye, who has spent the past three seasons with the Suns, is a 29-year-old 3-point ace. Since joining the Suns, he has connected on 434 3-pointers, third-most in the NBA during that span.
Frye, 29, averaged 10.5 points, 5.9 rebounds and 1.4 assists in 64 games last season. He had previous stints with New York and Portland.