U.S. stock index futures indicated a lower open on Tuesday amid of a raft of major economic data releases, which investors will look to for signals on the timing of a rate hike.
"Futures are reflecting the move in the overseas data," said Art Hogan, chief market strategist at Wunderlich Securities.
European shares traded mixed, while Chinese shares plummeted after the Reserve Bank of Australia cut interest rates for the second time this year.
In the United States, March trade figures showed that the trade deficit was $51.4 billion, the largest since 2008 as imports surged. February's figure was increased slightly to $35.9 billion from $35.4 billion.
Analysts expected the March trade deficit to widen to $42.5 billion.
In other economic news, April's non-manufacturing ISM comes at 10:00 a.m. ET, and the PMI services index at 9:45 a.m.