The Dutch international defender left Heerenveen to join Feyenoord on a three-year deal in the summer of 2012.
Impressive displays for club and country are reported to have raised Inter's interest in the 24-year-old.
However, despite the rumours, Janmaat claims that there have not been any firm negotiations between the clubs as yet.
"I've heard the talk about Inter's interest for me, but for the moment there has been nothing concrete," said Janmaat.
"I don't think Inter have contacted Feyenoord yet, so for the moment I don't think about it. Inter are a big side, so I will wait to see how the situation goes."