In this paper, we study basic properties of global
ȷ
\jmath
-crystal bases for integrable modules over a quantum symmetric pair coideal subalgebra
U
ȷ
\mathbf {U}^{\jmath }
associated to the Satake diagram of type AIII without black nodes. Also, we obtain an intrinsic characterization of the
ȷ
\jmath
-crystal bases, whose original definition is artificial.