Cell adhesion molecule that functions as a receptor ligand of the signaling receptor ITGAL:ITGB2/LFA-1 (lymphocyte-function associated (LFA) molecule 1) ensuring apoptotic neutrophil phagocytosis by macrophages (PubMed:1448173, PubMed:1448174, PubMed:23775590, PubMed:8325327, PubMed:8459213). Is also a ligand for integrin ITGAD/ITGB2 (PubMed:8777714). Ligand of CD209 on dendritic cells (DC) through an integrin-independent mechanism that requires Ca(2+) and that forms a first contact between DC and resting T cell, facilitating the downstream DC-T cell clustering process and DC-induced proliferation of resting T Cells (PubMed:10721994). {ECO:0000269|PubMed:10721994, ECO:0000269|PubMed:1448173, ECO:0000269|PubMed:1448174, ECO:0000269|PubMed:23775590, ECO:0000269|PubMed:8325327, ECO:0000269|PubMed:8459213, ECO:0000269|PubMed:8777714}. This is the function of ENSG00000076662 (ICAM3, intercellular adhesion molecule 3).