The District of Columbia Democratic Party missed the legal deadline last Tuesday for naming President Carter's electors for the Nov. 4 election, the D.C. Board of Elections and Ethics reported yesterday.

Seven other parties met the deadline, including the Republicans, who chose three potential D.C. electors for their nominee, Ronald Reagan.

Elections board Chairman Albert J. Beveridge III said the D.C. law that set last Tuesday's deadline does not provide for any sanctions against candidates who missed it.

"As a practical matter," Beveridge said, the board probably will certify the electors whose names are submitted late. "Unfortunately, the Democrats did not pay attention to the laws and the rules," he said.

Beveridge, a lawyer and a Democrat, serves part-time on the three-person elections board.

Robert B. Washington Jr., chairman of the D.C. Democratic State Committee, refused comment and referred questions to Mary Eva Candon, the local party's executive director.

Candon said she overlooked the deadline that was listed in voluminous material sent to the party early this year. When she discovered the apparent lapse last week, she said she called the Board of Elections and was told there would be no problem if the party filed the three names soon.

Members of the party's executive committee were not availalbe immediately, Candon said, but since have approved the names of the electors that will be filed today.

Delores Woods, deputy elections administrator, said the Democrats were not told they could have extra time for their filing.

Under the U.S. election system, votters technically do not vote for the presidential candidates but rather for electors, who in turn cast their votes for the president and his vice presidential running mate. The electors for each candidate are preselected by his party in each state and the District of Columbia.

The only problem that apparently could trouble Carter as a result of the lapse in selecting D.C. electors would arise if, in a tight election, the ultimate outcome rested on a narrow margin -- as was the case in the contested Tilden-Hayes election of 1876, ultimately won by Rutherford B. Hayes. If Carter were to carry the District of Columbia in a narrow election, the Reagan forces conceivably could allege that the Carter electors were improperly certified.

The names of electors were filed proir to the deadline last week in behalf of John B. Anderson as the candidate of a so-called "Independent Party" as well as for candidates for the Citizen's, Communist, Libertarian, Socialist Workers and Workers World parties.