RSI Rete Tre is the third Italian-language radio station from Radiotelevisione svizzera di lingua italiana (RSI), aimed at younger listeners broadcasting popular and alternative music.

It was launched at 00:03 on 1 January 1988 and is available via DAB+, IPTV, satellite and the Internet.

On 1 January 2008, a party was held in the city centre of Lugano, beginning at 0:03, to celebrate the twentieth anniversary of the station, with a special song "We Are Rete Tre" (cover of the more famous "We Are the World").

In 2008, in Lugano, a large demonstration was organised for the twentieth anniversary of the station.

Previously, RSI Rete Tre's FM network mainly covered the Italian-speaking cantons of Ticino and Graubünden.