The World Series by Renault is a motor racing series. The series consists of the flagship Formula Renault 3.5 Series (often referred to as simply World Series by Renault or indeed simply WSR), the Eurocup Formula Renault 2.0 and the Renault Sport Trophy. The F4 Eurocup 1.6 was made part of the World Series in 2010, but was then dropped for 2011. The Formula Renault 3.5 will cease to be part of the World Series by Renault package from 2016 onwards.
In 2005, Renault left the Super Racing Weekend and started the World Series by Renault and the Formula Renault 3.5 Series, merging both the World Series by Nissan (whose engine contract had finished) and Renault V6 Eurocup. The Dallara chassis was retained, while the Renault V6 was improved to 425 PS. Formula Renault 2.0 Eurocup and the Eurocup Mégane Trophy also joined the series in 2005 to support the main FR3.5 series.
At the end of July 2015, Renault Sport announced it would be withdrawing its backing to the Formula Renault 3.5 from 2016 onwards, handing the control of the series to co-organiser RPM. However, Renault Sport also said it would continue the World Series by Renault with the Renault Sport Trophy and the Formula Renault 2.0 Eurocup.