Component of the exocyst complex involved in the docking of exocytic vesicles with fusion sites on the plasma membrane. The exocyst complex is composed of EXOC1, EXOC2, EXOC3, EXOC4, EXOC5, EXOC6, EXOC7 and EXOC8 (PubMed:9405631). Interacts with EXOC3L1 (By similarity). Localization at the midbody requires the presence of RALA, EXOC2 and EXOC3. Ubiquitous. Belongs to the SEC10 family.