HideTooltip

<div id="chart"></div>
<script>
  $("#chart").kendoChart({
    series: [{ data: [1, 2] }]
  });

  var chart = $("#chart").data("kendoChart");

  chart.showTooltip(function(point) {
    return point.value === 2;
  });

  chart.hideTooltip();
</script>