Receptor for C-C type chemokine. Binds and responds to a variety of chemokines, including CCL11, CCL26, CCL7, CCL13, RANTES(CCL5) and CCL15 (PubMed:7622448, PubMed:8642344, PubMed:8676064). Subsequently transduces a signal by increasing the intracellular calcium ions level (PubMed:8676064). In addition acts as a possible functional receptor for NARS1 (PubMed:30171954). (Microbial infection) Alternative coreceptor with CD4 for HIV-1 infection. (Microbial infection) Interacts with HIV-1 protein Tat. In eosinophils as well as trace amounts in neutrophils and monocytes. Overexpression of CCR3 together with its ligands appears to be a characteristic of ulcerative colitis (UC). The production of CCR3 ligands by human colonic epithelial cells suggests further that the epithelium can play a role in modulating pathological T-cell-mediated mucosal inflammation (PubMed:21077277). Belongs to the G-protein coupled receptor 1 family. CC chemokine receptors entry