A highly nonlinear suspended core fiber (SCF) has been proposed, where a geometrical design parameter called suspension factor (SF) has been used for dispersion tailoring in the infrared region ( $1.2\mathrm{\mu m}$ to $2.8\mathrm{\mu m}$ ). We have investigated the effect of different suspended conditions of the SCF core on group velocity dispersion, fiber nonlinearity, and power distributions. Peak effective nonlinearity ( $\sim 500{\mathrm{W}}^{-1}{\mathrm{m}}^{-1}$ at $1200\mathrm{nm}$ with eight air holes) can be varied significantly with SF. The effect of SF on tailoring the zero dispersion wavelengths has been observed. The SF can also be utilized to control mode overlap between core mode and air hole mode for different sensing applications.