In Brazil, numerous participatory institutions have been suspended over the past decades, including many participatory budgeting (PB) programs at the municipal level. Since the introduction of PB in Porto Alegre in 1989, extensive literature has discussed its effects on the way urban social movements make demands. However, the suspension of many PBs across Brazil raises a new question: how do these movements adapt following the loss of an arena that had become central to their efforts? Looking at the pioneering experience of Porto Alegre’s PB, whose progressive erosion started in 2002, I argue that urban movements have since shifted away from institutionalized participation routines, and adopted new routines that combine bureaucratic activism with proximity politics. Focusing on these movements’ repertoires of interactions I argue that the erosion of PB led to the deinstitutionalization of urban social movements.