A delivery catheter for deploying an implantable medical device at an implant site, and the delivery catheter comprising: an elongate tubular member extending from a proximal end to a distal end, the elongate tubular member including a lumen that extends from a proximal opening at the proximal end to a distal opening at the distal end; and a tethering assembly comprising: a tether line; a grip member located distal to the distal end of the elongate tubular member and configured to be coupled to the tether line, the grip member comprising a grip member base, a plurality of apertures formed through the grip member base, and a plurality of elastic fingers extending distally from the grip member base and being spaced apart from one another around the plurality of apertures, the plurality of elastic fingers defining a cavity and being configured to hold a proximal end of the implantable medical device within the cavity, and each elastic finger of the plurality of elastic fingers being deformable to allow insertion and withdrawal of the proximal end of the implantable medical device; a release member comprising a release member base, a longitudinal lumen extending through the release member base and configured to allow the tether line to pass through the release member, and a plurality of legs extending distally from the release member base, each leg of the plurality of legs extending through and being in sliding engagement with a corresponding aperture of the plurality of apertures of the grip member base and having a distal end configured to secure the release member to the grip member, the release member being movable from a first position in which the proximal end of the implantable medical device fits within the cavity of the grip member and a second position in which the plurality of legs extend into the cavity of the grip member such that the proximal end of the implantable medical device does not fit therein. an elongate tubular member extending from a proximal end to a distal end, the elongate tubular member including a lumen that extends from a proximal opening at the proximal end to a distal opening at the distal end; and a tethering assembly comprising: a tether line; a grip member located distal to the distal end of the elongate tubular member and configured to be coupled to the tether line, the grip member comprising a grip member base, a plurality of apertures formed through the grip member base, and a plurality of elastic fingers extending distally from the grip member base and being spaced apart from one another around the plurality of apertures, the plurality of elastic fingers defining a cavity and being configured to hold a proximal end of the implantable medical device within the cavity, and each elastic finger of the plurality of elastic fingers being deformable to allow insertion and withdrawal of the proximal end of the implantable medical device; a release member comprising a release member base, a longitudinal lumen extending through the release member base and configured to allow the tether line to pass through the release member, and a plurality of legs extending distally from the release member base, each leg of the plurality of legs extending through and being in sliding engagement with a corresponding aperture of the plurality of apertures of the grip member base and having a distal end configured to secure the release member to the grip member, the release member being movable from a first position in which the proximal end of the implantable medical device fits within the cavity of the grip member and a second position in which the plurality of legs extend into the cavity of the grip member such that the proximal end of the implantable medical device does not fit therein. a tether line; a grip member located distal to the distal end of the elongate tubular member and configured to be coupled to the tether line, the grip member comprising a grip member base, a plurality of apertures formed through the grip member base, and a plurality of elastic fingers extending distally from the grip member base and being spaced apart from one another around the plurality of apertures, the plurality of elastic fingers defining a cavity and being configured to hold a proximal end of the implantable medical device within the cavity, and each elastic finger of the plurality of elastic fingers being deformable to allow insertion and withdrawal of the proximal end of the implantable medical device; a release member comprising a release member base, a longitudinal lumen extending through the release member base and configured to allow the tether line to pass through the release member, and a plurality of legs extending distally from the release member base, each leg of the plurality of legs extending through and being in sliding engagement with a corresponding aperture of the plurality of apertures of the grip member base and having a distal end configured to secure the release member to the grip member, the release member being movable from a first position in which the proximal end of the implantable medical device fits within the cavity of the grip member and a second position in which the plurality of legs extend into the cavity of the grip member such that the proximal end of the implantable medical device does not fit therein.