Summary: It is shown that the generator of the nonstandard fermion-monopole supersymmetry uncovered by De Jonghe, Macfarlane, Peeters and van Holten, and the generator of its standard \(N=1/2\) supersymmetry have to be supplemented by their product operator to be treated as independent supercharge. As a result, the fermion-monopole system possesses the nonlinear \(N=3/2\) supersymmetry having the nature of the 3D spin-1/2 free particle’s supersymmetry generated by the supercharges represented in a scalar form. Analyzing the supercharges’ structure, we trace how under reduction of the fermion-monopole system to the spherical geometry the nonlinear \(N=3/2\) superalgebra comprising the Hamiltonian and the total angular momentum as even generators is transformed into the standard linear \(N=1\) superalgebra with the Hamiltonian to be the unique even generator.

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