Enables histone H3T3 kinase activity. Involved in positive regulation of maintenance of mitotic sister chromatid cohesion, centromeric; positive regulation of protein localization to chromatin; and post-translational protein modification. Located in chromatin and nuclear lamina. Is expressed in amnioserosa and embryonic/larval plasmatocyte. Orthologous to human HASPIN (histone H3 associated protein kinase).