Earlier this week, the 67 year old was handed a three month community order for all three charges. He's also been given a three month curfew, ordered to pay prosecution costs as well as a victim surcharge of £60.
He had pleaded not guilty.
In statement the Board of Trustees of Barnabus Aid International, an offshoot of Barnabus Fund, expressed sadness over the verdict.
They said: "Whilst Patrick Sookhdeo would have been able to continue as a trustee of Barnabas Aid International, he has asked to resign from this post and the board has accepted his resignation. The board will review this with Dr Sookhdeo after three months.
"During the next three months, he will be considering his future but has agreed to be available in his personal capacity if requested.
"His curfew prevents him from travelling overseas during this time, so he has had to decline to attend certain engagements."
During his case, Swindon Crown Court heard how he asked a woman, who can't be named, if he could trust her before inappropriately touching her.
The victim said the incident made her frightened, physically sick and prevented her from sleeping.
Mr Sookhdeo has been campaigning on behalf of the persecuted church for many years. He's written extensively on Islam and interfaith relations.
Last year an internal investigation at Barnabus Fund cleared him of any wrongdoing.
The charity has confirmed it will continue supporting the persecuted Church despite these developments.