No. Bell is listed in the program among the 41 members of the honorary committee of the First International Eugenics Conference held in London in 1912. However, Bell did not speak at the event nor did he attend or present a paper.
In 1921 Bell was the honorary president of the Second International Congress of Eugenics held under the auspices of the American Museum of Natural History in New York. Bell did not attend, present a paper or speak as part of the proceedings. The summary of the proceedings notes that Bell was a “pioneering investigator in the field of human heredity.”