The microwave spectrum of the van der Waals complex CF3Cl-Ar has been investigated by pulsed jet Fourier transform microwave spectroscopy. The observed spectra of the Cl-35 and Cl-37 isotopologues are typical of asymmetric tops, with rotational constants A, B, C = 3373.118(4), 988.2529(4), 879.5788(3) and 3286.66(4), 985.50(3), 871.359(8) MHz, respectively. The Ar atom is almost "L-shaped" with respect to the Cl-C bond, at a r(0) distance of 3.824(2) angstrom from the center of mass (CM) of CF3Cl and with the angle Cl-CM-Ar = 81(2)degrees. The dissociation energy has been estimated to be 2.3 kJ mol(-1). (C) 2016 Elsevier B.V. All rights reserved.