The near infrared high-resolution spectra of the a-type transitions of the weak 3v(1)+2v(2) combination band of transient HO35(37)Cl at 12600 cm(-1) has been recorded in an ultrasensitive titanium:sapphire intracavity laser absorption spectrometer (ICLAS). We report line assignments, new and refined anharmonicity parameters, and the spectroscopic constants for the excited rovibrational states of 3v(1)+2v(2). The Fermi resonance perturbations in this five quanta region, where the internal energy of the molecule is already more than 2/3 of the dissociation energy E(0), remain localized and they are the exception, while the extent of intermode mixing and thus intramolecular vibrational energy distribution (IVR) seems to be still small. A Dunham expansion is used for band origin predictions and representations of vibrational states N(E) of (HOCl)-Cl-35 up to the dissociation threshold. The results are compared with harmonic and anharmonic numbers of states from a recently proposed stretch-bend coupling model.