Tamil diasporic collective actions have undergone a reframing process since the end of the Sri Lankan conflict in 2009. This reframing is characterized by the emergence of a new discourse on the recognition of genocide and presents a major break with the Liberation Tigers of Tamil Eelam’s (LTTE) discourse on the independence of Tamil Eelam. Building on the literature on social movements and collective action, and drawing on concepts such as window of opportunity and mobilizing structures, this paper provides an explanation as to why such reframing is taking place. Using a qualitative frame analysis approach, we deconstruct five Tamil diasporic collective actors’ discourses on Tamil independance and Tamil genocide, using articles published on Tamilnet.com from 2000 to 2015. Our results show that the window of opportunity explanation fails to account for this reframing. Conversely, we demonstrate that this change of frames is due to the emergence of new collective actors, bearers of a new discourse on the recognition of genocide.