Mayor Marion Barry has raised $359,430 in contributions to his reelection campaign since early March, about 100 times as much as his nearest rival, according to a report by Barry's campaign committee filed yesterday with the D.C. Office of Campaign Finance.

Other campaign reports show a strong fund-raising effort by Democrat Mary Draper Janney, a political newcomer who is running for the Ward 3 seat on the D.C. City Council that will be vacated when council member Polly Shackleton, a Democrat, retires this year.

Janney, who raised $33,259 during the three-month filing period, outstripped her closest competitor in the Ward 3 race, Ruth Dixon, by more than $21,000.

In the race for two at-large council seats, incumbent Betty Ann Kane (D-At Large) collected $25,007 in contributions during the filing period, according to her report.

City Council Chairman David A. Clarke, who announced April 20 that he intends to seek reelection, raised $14,202 during the period.

Many of the candidates' reports, filed to meet yesterday's deadline, arrived in the campaign finance office late in the day and campaign finance office director Keith Vance said only partial information would be made public before the close of business.

Some of the candidates' summary statements were released but detailed information on contributors and expenditures was unavailable. Michael Simpson, spokesman for the campaign finance office, said it was unclear whether all the registered candidates had met the deadline.

Barry's campaign committee on Monday submitted an amended statement for the previous period -- January and February -- showing that he raised $1,130 more than the previously reported $149,650. To date, the mayor's reports indicate he has raised a total of $510,210.

The prospect of a major challenge to Barry dimmed earlier this week when City Council member John A. Wilson (D-Ward 2) announced he will not run for the office of mayor.

With Clarke's withdrawal earlier, the only well-known figure believed to be considering a challenge is council member Charlene Drew Jarvis (D-Ward 4).

However, political observers say the recent disclosure of alleged campaign financial improprieties by the Jarvis campaign during her reelection bid in 1984 and her run for mayor in 1982 have lessened the chances that she will enter the mayoral race this year.

The second highest fund-raising tally in the mayor's race was filed by Democrat Mattie Taylor, a former school board member and retired D.C. Department of Employment Services official, who reported contributions of $3,810 for the three-month period.

Independent Brian Moore, a health care consultant, reported that he raised $2,670 between March 1 and June 1.

Calvin Gurley, another independent challenger in the mayoral race, reported that he raised $842 during the period.

Democrat Dennis Sobin filed a statement showing that he collected $1,000 during the period -- all from his mother, Antoinette Sobin, a retired school principal living in New York, Sobin said.

Barry's records show that, after campaign expenditures, he had $398,887 in cash on hand; Moore had $1,801; Taylor had $872; Gurley had $29, and Sobin had $1,142.

In the Ward 3 race, Dixon, a political scientist and newsletter publisher, reported contributions of $12,036 during the period, considerably less than Janney but higher than the figures submitted for March, April and May by other rivals for the Democratic nomination to the council seat.

Jim Nathanson, a school teacher who has been endorsed by Shackleton, collected $6,848.

Mark Plotkin, a professional political fund raiser, reported $6,878.

Republican Gloria Corn raised $475.

Janney, a civic activist who has served as head of the board of trustees of Vassar College, reported she had $24,638 in cash on hand.

Dixon had $6,384; Nathanson had $8,568; Plotkin had $8,838, and Corn had $435.

City Council member Frank Smith (D-Ward 1) reported contributions of $6,115 for the period and $15,329 in cash on hand.