The R3 is a line of Rodalies de Catalunya's Barcelona commuter rail service, operated by Renfe Operadora.

It runs northwards from the Barcelona area to the French border town of Latour-de-Carol, passing through the Vallès Oriental, Osona and Ripollès regions.

With a total line length of 165.9 kilometres (103.1 mi), it extends notably beyond the limits of the Barcelona metropolitan area, reaching the Pyrenees mountains.

[3] In 2010, after the administration of the Barcelona commuter rail service was transferred to the Catalan government, the line was extended from its original northern terminus at Vic to Latour-de-Carol-Enveitg.

[10] The following table lists the name of each station served by line R3 in order from south to north; the station's service pattern offered by R3 trains (excepting the semidirect trains, which only call at Vic, Ripoll and Puigcerdà stations north of Barcelona Sant Andreu Arenal); the transfers to other Rodalies de Catalunya lines, including both commuter and regional rail services; remarkable transfers to other transport systems; the municipality in which each station is located; and the fare zone each station belongs to according to the Autoritat del Transport Metropolità (ATM Àrea de Barcelona) fare-integrated public transport system and Rodalies de Catalunya's own fare zone system for Barcelona commuter rail service lines.