Shares of Cava Group Inc. tumbled late Tuesday after the Mediterranean fast-casual restaurant chain trimmed its full-year same-store sales outlook, as it tries to top last year’s strong numbers and as consumers deal with what its chief executive called a “fog” over the economy.

The Mediterranean fast casual restaurant reported same-restaurant sales growth of 2.1%, well below analysts’ expectations of 6.1%.

While second quarter revenue rose 20%, the fast-casual restaurant operator is navigating a “fluid macroeconomic environment.”