GO:0052844:   inositol-3-diphosphate-1,2,4,5,6-pentakisphosphate diphosphatase activity
Catalysis of the reaction: inositol 3-diphosphate 1,2,4,5,6-pentakisphosphate + H2O = inositol 1,2,3,4,5,6-hexakisphosphate + phosphate + 2 H+.