The 30-share barometer resumed lower and fell to a low of 33,653.41 in intra-day trade. The index settled at 33,746.78 down 300.16 points, or 0.88 per cent. The gauge had lost 398.81 in the previous three sessions.
This was the lowest closing since February 20 when it had finished at 33,703.59.
The 50-issue NSE Nifty too cracked below the 10,400-mark and hit a low of 10,323.90 before finishing 99.50 points, or 0.95 per cent down at 10,358.85.
The seasonally adjusted Nikkei India Services Business Activity Index fell from 51.7 in January to 47.8 in February, its lowest level since August.
Overseas, weakening trend in Asian bourses as the fallout from Trump's steel and aluminium tariffs continued to spook investors and dampen the market sentiment, brokers said.
The losses came even as Bharatiya Janata Party's strong showing in three Northeast states, they added.