Photo illustration of Euro and U.S. dollar banknotes.

The dollar dropped to a three-week low on Tuesday on news of the smallest annual increase in inflation in more than two years, cementing expectations that the Federal Reserve will pause interest rate hikes at its two-day meeting ending on Wednesday.

The dollar index slid to as low as 103.04 following the data, and was last down 0.3% at 103.30 . The euro rose 0.3% to $1.0791 , after climbing to $1.0824, its highest since May 22.