Tunisia's annual inflation rate fell to 5.8 percent in September, its third consecutive monthly decline, official data showed on Friday.
Inflation was 6 percent in August and 6.2 percent in July, having fallen from 6.5 percent in March, the highest rate in at least five years.
Central bank Governor Chedly Ayari said on Tuesday the bank may cut interest rates to boost economic growth if inflation continues to decline.
Food and drink prices rose 7.7 percent in September, while clothing and footwear prices dropped 6.9 percent, the state statistics institute said.
Tunisia's economy is struggling with a big external deficit made worse by a big fall in tourism revenues since the uprising that overthrew President Zine al-Abidine Ben Ali in January 2011 and marked the start of the Arab Spring.
The central bank says it does not target a particular inflation rate but the most that should be tolerated is 5 percent. The rate has not dropped below 5 percent this year.