Annual core inflation rate, which excludes energy and unprocessed food products components, is expected to rise to 0.6 percent from 0.2 percent in April.
On a monthly basis, consumer prices are set to went up 0.4 percent, easing from 0.7 percent in the previous month, the preliminary figures showed.
The harmonized consumer price index is expected to advance 1.4 percent year-on-year (compared to 0.3 percent in April) and 0.8 percent month-over-month (compared to 1.0 percent in April).