HTML:
<div class="parent">
<div class="div1"> </div>
<div class="div2"> </div>
<div class="div3"> </div>
</div>

CSS:
.parent {
display: grid;
grid-template-columns: 1fr 2fr 1fr;
grid-template-rows: 1fr;
grid-column-gap: 10px;
grid-row-gap: 0px;
}

.div1 { grid-area: 1 / 1 / 2 / 2; }
.div2 { grid-area: 1 / 2 / 2 / 3; }
.div3 { grid-area: 1 / 3 / 2 / 4; }