Binds actin and actin filament bundles in a Ca(2+)-insensitive manner, but severs actin filaments in a calcium-dependent manner, regardless of the presence or not of VLN1 (AC O81643). Acts redundantly with VLN2 (AC O81644) to generate thick actin filament bundles, to regulate directional organ growth (PubMed:22209875) and in sclerenchyma development (PubMed:22563899). Expressed in all tissues examined, including root hairs. The HP domain is important for the localization to actin filament bundles. No visible phenotype. Vln2 and vln3 double mutants show absence of thick actin filament bundles in the cells, anomaly in the growth direction of organs (PubMed:22209875) and defects in sclerenchyma development, but no alterations in the secondary cell-wall machinery (PubMed:22563899). Belongs to the villin/gelsolin family.