July arabica coffee was little changed at $1.4590 per lb.
The Brazilian real hit a 2-1/2 month high versus the dollar on Wednesday, deterring farmers and exporters from selling by lowering returns in local currency terms.
The east African country's is Africa's largest coffee exporter and earnings from the crop constitute the second largest source foreign exchange after gold.
Shipments in March rose to 572,839 60-kg bags compared to exports in the same period 12 months earlier, state-run Uganda Coffee Development Authority (UCDA) said in a report.
Mills in Brazil's centre-south produced 23pc less sugar in the second half of March versus a year ago, as operations in the new sugar season got off to a slow start.
Price controls for coffee were mostly abandoned years ago due to the difficulty of reaching global agreements on supply, exposing farmers to sharp price crashes. In 2019, the world's third-largest producer, Colombia, introduced subsidies for coffee growers and, along with Brazil, called for supply caps.
Lopez Obrador has authorized price floors for other agricultural commodities, including Mexico's staple corn, but has to yet to carry through on most of his coffee campaign promises.
Ukraine's economy ministry on Thursday said the country needs to import 110,000 tonnes of sugar this season to meet local needs after low sugar production in 2020.
"We forecast the global market in an 8.5 million tonne surplus in both 2020/21 and in 2021/22. In 2021/22, production will recover in the EU, Thailand and Russia among others," said Fitch Solutions.
Last year the family-owned company recorded sales worth 2.085 billion euros as its retail business only partly compensated for a drop in out-of-home coffee consumption.
Earnings before interest, taxes, depreciation, and amortisation (EBITDA) came in at 253 million euros in 2020, down 13% on 2019.
May raw sugar fell by 0.12 cents, or 0.8%, to 15.07 cents per lb.
"The funds, who started the year in a very ebullient mood (on sugar), seem to be throwing in the towel as prices fall through key support levels," analyst Green Pool said in a weekly market update.