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For a finite group , we denote byC⁢D⁢(G)\mathcal{CD}(G)the Chermak–Delgado lattice of , and byv⁢(G)v(G)the number of conjugacy classes of subgroups of  not inC⁢D⁢(G)\mathcal{CD}(G). In this paper, we determine the finite groups  for whichv⁢(G)=1,2,3v(G)=1,2,3.

Finite groups with few subgroups not in the Chermak–Delgado lattice