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In this talk we discuss the nonfactorizable charm-loop effect in the rare FCNC decay 𝐵𝑠→𝛾𝛾. The nonfactorizable contribution comes from the soft gluon emission from c-quark loop. The rigorous calculation requires the knowledge of three particle DA with three independent coordinates. We properly study the influence of three particle DA form on the amplitude by the case of 𝐵𝑠→𝛾∗𝛾∗ decay. The numerical estimations are presented for 𝐵𝑠→𝛾𝛾 decay branching.