The search for a Higgs boson decaying to invisible particles, produced through the vector boson fusion mode in the High-Luminosity LHC proton-proton collisions at \sqrt{s}=14~\mathrm{TeV}, is investigated based on simulation studies using Delphes, a fast-simulation package used to provide a parameterised response of the upgraded CMS detector. The event selection follows the existing CMS Run II data analysis, optimised for the High-Luminosity LHC conditions. The $95\%$ confidence-level upper limits on the branching fraction of a standard-model-like Higgs boson decaying to invisible final states are studied with integrated luminosities of $300$, $1000$ and 3000~\mathrm{fb}^{-1} as a function of the thresholds applied on the transverse energy of the recoiling Higgs boson deposited in the detector.

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