There is a space at the heart of “The Third Muslim” reserved for Numair Abbasi, a Pakistani artist whose art frequently includes nude male bodies. His work, however, does not hang there. Instead, there exists only a thin gold frame surrounding a note against a background of bright teal. The note informs viewers that Abbasi’s work, which was to be part of a group exhibition by queer, transgender and gender-nonconforming Muslim artists at SOMArts Cultural Center, was confiscated by Pakistani authorities just days before the show was set to open.