The term ‘suicide cluster’ describes a situation in which more suicides than expected occur in terms of time, place, or both. It is difficult to precisely define a cluster. A suicide cluster usually includes three or more deaths; however, two suicides occurring in a specific community or setting (for example a school) in a short time period should also be taken very seriously in terms of possible links and impacts (even if the deaths are apparently unconnected), particularly in the case of young people (PHE, 2019).